Phân tích đa thức ab+b\sqrt{a}+\sqrt{a}+1 a b + b a <path d="M95,702c-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5, -10,-9.5,-14c0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54c44.2,-33.3,65.8, -50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10s173,378,173,378c0.7,0, 35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429c69,-144,104.5,-217.7,106.5, -221c5.3,-9.3,12,-14,20,-14H400000v40H845.2724s-225.272,467,-225.272,467 s-235,486,-235,486c-2.7,4.7,-9,7,-19,7c-6,0,-10,-1,-12,-3s-194,-422,-194,-422 s-65,47,-65,47z M834 80H400000v40H845z"> + a <path d="M95,702c-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5, -10,-9.5,-14c0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54c44.2,-33.3,65.8, -50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10s173,378,173,378c0.7,0, 35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429c69,-144,104.5,-217.7,106.5, -221c5.3,-9.3,12,-14,20,-14H400000v40H845.2724s-225.272,467,-225.272,467 s-235,486,-235,486c-2.7,4.7,-9,7,-19,7c-6,0,-10,-1,-12,-3s-194,-422,-194,-422 s-65,47,-65,47z M834 80H400000v40H845z"> + 1 thành nhân tử

( a + 1 ) ( b a + 1 ) \left(\sqrt{a}+1\right)\left(b\sqrt{a}+1\right) ( a <path d="M95,702c-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5, -10,-9.5,-14c0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54c44.2,-33.3,65.8, -50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10s173,378,173,378c0.7,0, 35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429c69,-144,104.5,-217.7,106.5, -221c5.3,-9.3,12,-14,20,-14H400000v40H845.2724s-225.272,467,-225.272,467 s-235,486,-235,486c-2.7,4.7,-9,7,-19,7c-6,0,-10,-1,-12,-3s-194,-422,-194,-422 s-65,47,-65,47z M834 80H400000v40H845z"> + 1 ) ( b a <path d="M95,702c-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5, -10,-9.5,-14c0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54c44.2,-33.3,65.8, -50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10s173,378,173,378c0.7,0, 35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429c69,-144,104.5,-217.7,106.5, -221c5.3,-9.3,12,-14,20,-14H400000v40H845.2724s-225.272,467,-225.272,467 s-235,486,-235,486c-2.7,4.7,-9,7,-19,7c-6,0,-10,-1,-12,-3s-194,-422,-194,-422 s-65,47,-65,47z M834 80H400000v40H845z"> + 1 )

( a + 1 ) b a \left(\sqrt{a}+1\right)b\sqrt{a} ( a <path d="M95,702c-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5, -10,-9.5,-14c0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54c44.2,-33.3,65.8, -50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10s173,378,173,378c0.7,0, 35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429c69,-144,104.5,-217.7,106.5, -221c5.3,-9.3,12,-14,20,-14H400000v40H845.2724s-225.272,467,-225.272,467 s-235,486,-235,486c-2.7,4.7,-9,7,-19,7c-6,0,-10,-1,-12,-3s-194,-422,-194,-422 s-65,47,-65,47z M834 80H400000v40H845z"> + 1 ) b a <path d="M95,702c-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5, -10,-9.5,-14c0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54c44.2,-33.3,65.8, -50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10s173,378,173,378c0.7,0, 35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429c69,-144,104.5,-217.7,106.5, -221c5.3,-9.3,12,-14,20,-14H400000v40H845.2724s-225.272,467,-225.272,467 s-235,486,-235,486c-2.7,4.7,-9,7,-19,7c-6,0,-10,-1,-12,-3s-194,-422,-194,-422 s-65,47,-65,47z M834 80H400000v40H845z">

2 ( 2 + 1 ) b a 2\left(\sqrt{2}+1\right)b\sqrt{a} 2 ( 2 <path d="M95,702c-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5, -10,-9.5,-14c0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54c44.2,-33.3,65.8, -50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10s173,378,173,378c0.7,0, 35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429c69,-144,104.5,-217.7,106.5, -221c5.3,-9.3,12,-14,20,-14H400000v40H845.2724s-225.272,467,-225.272,467 s-235,486,-235,486c-2.7,4.7,-9,7,-19,7c-6,0,-10,-1,-12,-3s-194,-422,-194,-422 s-65,47,-65,47z M834 80H400000v40H845z"> + 1 ) b a <path d="M95,702c-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5, -10,-9.5,-14c0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54c44.2,-33.3,65.8, -50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10s173,378,173,378c0.7,0, 35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429c69,-144,104.5,-217.7,106.5, -221c5.3,-9.3,12,-14,20,-14H400000v40H845.2724s-225.272,467,-225.272,467 s-235,486,-235,486c-2.7,4.7,-9,7,-19,7c-6,0,-10,-1,-12,-3s-194,-422,-194,-422 s-65,47,-65,47z M834 80H400000v40H845z">

( a + 1 ) + ( b a + 1 ) \left(\sqrt{a}+1\right)+\left(b\sqrt{a}+1\right) ( a <path d="M95,702c-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5, -10,-9.5,-14c0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54c44.2,-33.3,65.8, -50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10s173,378,173,378c0.7,0, 35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429c69,-144,104.5,-217.7,106.5, -221c5.3,-9.3,12,-14,20,-14H400000v40H845.2724s-225.272,467,-225.272,467 s-235,486,-235,486c-2.7,4.7,-9,7,-19,7c-6,0,-10,-1,-12,-3s-194,-422,-194,-422 s-65,47,-65,47z M834 80H400000v40H845z"> + 1 ) + ( b a <path d="M95,702c-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5, -10,-9.5,-14c0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54c44.2,-33.3,65.8, -50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10s173,378,173,378c0.7,0, 35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429c69,-144,104.5,-217.7,106.5, -221c5.3,-9.3,12,-14,20,-14H400000v40H845.2724s-225.272,467,-225.272,467 s-235,486,-235,486c-2.7,4.7,-9,7,-19,7c-6,0,-10,-1,-12,-3s-194,-422,-194,-422 s-65,47,-65,47z M834 80H400000v40H845z"> + 1 )

tan ⁡ α = 1 , 0229 ⟹ α ≈ ? \tan\alpha=1,0229\ \ \Longrightarrow\ \ \alpha\approx? tan α = 1 , 0 2 2 9 ⟹ α ≈ ? (Làm tròn đến phút)

4 5 o 3 9 ′ 45^o39' 4 5 o 3 9 ′

4 5 o 3 8 ′ 45^o38' 4 5 o 3 8 ′

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LUYỆN TẬP

Quiz

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Mathematics

•

9th Grade

•

Practice Problem

•

Hard

Hoàng An

Used 5+ times

FREE Resource

20 questions

Show all answers

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Giá trị của biểu thức $\sqrt{\left(2+\sqrt{7}\right)^2}$

$2+\sqrt{7}$

$2-\sqrt{7}$

$\sqrt{7}-2$

$-2-\sqrt{7}$

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Giá trị của biểu thức $\sqrt{12,5}.\sqrt{2}$ là

6,25

-25

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Rút gọn biểu thức $ab^2\sqrt{\frac{3}{a^2b^4}}\ \ \ \left(a<0,\ b\ne0\right)$

$-\sqrt{\frac{3}{ab^2}}$

$\sqrt{\frac{3}{ab^2}}$

$-\sqrt{3}$

$\sqrt{3}$

MULTIPLE CHOICE QUESTION

5 sec • 1 pt

Cho tam giác ABC vuông tại C, sinA bằng

$\frac{AB}{AC}$

$\frac{AB}{BC}$

$\frac{BC}{AC}$

$\frac{BC}{AB}$

MULTIPLE CHOICE QUESTION

5 sec • 1 pt

Trong tam giác ABC vuông tại A, cosB bằng

$\frac{AB}{BC}$

$\frac{AB}{AC}$

$\frac{AC}{BC}$

$\frac{BC}{AB}$

MULTIPLE CHOICE QUESTION

5 sec • 1 pt

Trong tam giác ABC vuông tại C, cotB bằng

$\frac{AB}{BC}$

$\frac{AC}{AB}$

$\frac{AC}{BC}$

$\frac{BC}{AB}$

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Tìm x biết $\sqrt{25x}-\sqrt{16x}=9$

x=1

x=3

x=9

x=81

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LUYỆN TẬP

20 questions

Giá trị của biểu thức $\sqrt{\left(2+\sqrt{7}\right)^2}$

Giá trị của biểu thức $\sqrt{12,5}.\sqrt{2}$ là

Rút gọn biểu thức $ab^2\sqrt{\frac{3}{a^2b^4}}\ \ \ \left(a<0,\ b\ne0\right)$

Cho tam giác ABC vuông tại C, sinA bằng

Trong tam giác ABC vuông tại A, cosB bằng

Trong tam giác ABC vuông tại C, cotB bằng

Tìm x biết $\sqrt{25x}-\sqrt{16x}=9$

Cho hình vẽ, tìm x?

Giá trị của biểu thức $\sqrt{-9a}-\sqrt{9+12a+4a^2}$ tại a=-9 là

Kết quả của biểu thức $\left(\sqrt{2}+1\right)^2+\left(\sqrt{2}-1\right)^2\$ bằng

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Giá trị của biểu thức \sqrt{\left(2+\sqrt{7}\right)^2}(2+7​)2​

Giá trị của biểu thức \sqrt{12,5}.\sqrt{2}12,5​.2​ là

Rút gọn biểu thức ab^2\sqrt{\frac{3}{a^2b^4}}\ \ \ \left(a<0,\ b\ne0\right)ab2a2b43​​ (a<0, b​=0)

Cho tam giác ABC vuông tại C, sinA bằng

Trong tam giác ABC vuông tại A, cosB bằng

Trong tam giác ABC vuông tại C, cotB bằng

Tìm x biết \sqrt{25x}-\sqrt{16x}=925x​−16x​=9

Cho hình vẽ, tìm x?

Giá trị của biểu thức \sqrt{-9a}-\sqrt{9+12a+4a^2}−9a​−9+12a+4a2​ tại a=-9 là

Kết quả của biểu thức (2+1)2+(2−1)2 \left(\sqrt{2}+1\right)^2+\left(\sqrt{2}-1\right)^2\ (2​+1)2+(2​−1)2 bằng

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Giá trị của biểu thức $\sqrt{\left(2+\sqrt{7}\right)^2}$

Giá trị của biểu thức $\sqrt{12,5}.\sqrt{2}$ là

Rút gọn biểu thức $ab^2\sqrt{\frac{3}{a^2b^4}}\ \ \ \left(a<0,\ b\ne0\right)$

Tìm x biết $\sqrt{25x}-\sqrt{16x}=9$

Giá trị của biểu thức $\sqrt{-9a}-\sqrt{9+12a+4a^2}$ tại a=-9 là

Kết quả của biểu thức $\left(\sqrt{2}+1\right)^2+\left(\sqrt{2}-1\right)^2\$ bằng