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Persamaan Kuadrat dan Fungsi Kuadrat

Authored by Ida Rosita

Mathematics

1st Grade

Used 88+ times

Persamaan Kuadrat dan Fungsi Kuadrat
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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Himpunan penyelesaian dari   2x2−x−3=02x^2-x-3=0  adalah

 {1,−32}\left\{1,-\frac{3}{2}\right\}  

 {−1,32}\left\{-1,\frac{3}{2}\right\}  

 {−1,−32}\left\{-1,-\frac{3}{2}\right\}  

 {1,32}\left\{1,\frac{3}{2}\right\}  

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Diketahui x1 dan x2 adalah akar-akar persamaan x2 −3x−4=0x^2\ -3x-4=0  dan  x1>x2x_1>x_2  . Nilai  2x1−x22x_1-x_2  adalah....

 99  

 77  

 −7-7  

 −9-9  

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Persamaan kuadrat yang memiliki akar-akar  x1=−7x_1=-7  dan  x2=2x_2=2  adalah....

 x2+5x+14=0x^2+5x+14=0  

 x2+5x−14 = 0x^2+5x-14\ =\ 0  

 x2−5x+14=0x^2-5x+14=0  

 x2−5x−14=0x^2-5x-14=0  

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Penyelesaian persamaan kuadrat  x2+px−q=0x^2+px-q=0  adalah  55   dan  −3-3 . Nilai dari  q3p+5\frac{q}{3p+5}  adalah....

 1515  

 33  

 −3-3  

 −15-15  

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Nilai diskriminan dari  x2+3x+2=0x^2+3x+2=0  adalah...

 22  

 −2-2  

 11  

 −1-1  

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Diketahui fungsi f(x)=x2−2x+3f\left(x\right)=x^2-2x+3 Nilai   f(1)f\left(1\right)  adalah....

2

3

4

5

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Persamaan fungsi kuadrat yang memotong sumbu x di titik (2, 0) dan (m, 0) serta memotong sumbu y di titik (0, –28) adalah  f(x)=2x2+10x−28f\left(x\right)=2x^2+10x-28 . Nilai m adalah ….

 −7-7  

 −14-14  

 −21-21  

 −28-28  

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