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Nhân đa thức

Authored by Ứng Lực

Mathematics

8th Grade

Nhân đa thức
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13 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Thực hiện phép nhân  x2(5x3x12).x^2\left(5x^3-x-\frac{1}{2}\right).  

 5x5x312x2.5x^5-x^3-\frac{1}{2}x^2.  

 5x63x212.5x^6-3x^2-\frac{1}{2}.  

 5x5x12.5x^5-x-\frac{1}{2}.  

 x2+5x3x12.x^2+5x^3-x-\frac{1}{2}.  

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Thực hiện phép nhân  (3xyx2+y)23x2y.\left(3xy-x^2+y\right)\frac{2}{3}x^2y.  

 2x3y223x2y+23x2y2.2x^3y^2-\frac{2}{3}x^2y+\frac{2}{3}x^2y^2.  

 2x3y223x4y+23x2y.2x^3y^2-\frac{2}{3}x^4y+\frac{2}{3}x^2y.  

 2x3y223x4y+23x2y2.2x^3y^2-\frac{2}{3}x^4y+\frac{2}{3}x^2y^2.  

 2x2y23x4y+23x2y2.2x^2y-\frac{2}{3}x^4y+\frac{2}{3}x^2y^2.  

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Thực hiện phép nhân  (4x35xy+2x)(12xy).\left(4x^3-5xy+2x\right)\left(-\frac{1}{2}xy\right).  

 2x3y+52xyx2y.-2x^3y+\frac{5}{2}xy-x^2y.  

 2x4y+52xyx2y.-2x^4y+\frac{5}{2}xy-x^2y.  

 2x3y+52x2y2xy.-2x^3y+\frac{5}{2}x^2y^2-xy.  

 2x4y+52x2y2x2y.-2x^4y+\frac{5}{2}x^2y^2-x^2y.  

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Tìm x,x,  biết x(52x)+2x(x1)=15.x\left(5-2x\right)+2x\left(x-1\right)=15.  

 x=5.x=5.  

 x=5.x=-5.  

 x=3.x=3.  

 x=3.x=-3.  

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Tìm x,x,  biết 3x(12x4)9x(4x3)=30.3x\left(12x-4\right)-9x\left(4x-3\right)=30. 

 x=14.x=\frac{1}{4}.  

 x=14.x=-\frac{1}{4}.  

 x=2.x=2.  

 x=2.x=-2.  

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Kết quả phép tính  2x2(5x23x3)2x^2\left(5x^2-3x^3\right)  là

 10x46x610x^4-6x^6  

 7x4x57x^4-x^5  

 10x46x510x^4-6x^5  

 10x4+6x510x^4+6x^5  

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Kết quả của phép tính (x+1)(x2)\left(x+1\right)\left(x-2\right)  

 x22x2x^2-2x-2  

 x2+2x+2x^2+2x+2  

 x2x2x^2-x-2  

 x2+x+2x^2+x+2  

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