Free Printable 乘法公式

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乘法公式

Total questions: 20

Worksheet time: 10mins

Name

Class

Date

1.

$x^2-2x+1$

a)

$\left(x+1\right)^2$

b)

$\left(x-1\right)^2$

c)

$\left(x+1\right)\left(x-1\right)$

d)

以上皆非

2.

$x^2-2\times x\times5+5^2$

a)

$\left(x+5\right)^2$

b)

$\left(x-5\right)^2$

c)

$\left(x-25\right)^2$

d)

$\left(x-5\right)\left(x+5\right)$

3.

$\left(2x\right)^2+2\times2x\times3+3^2$

a)

$\left(x+3\right)^2$

b)

$\left(2x+3\right)^2$

c)

$\left(4x+9\right)^2$

d)

$\left(2x-3\right)^2$

4.

$\left(4x\right)^2-7^2$

a)

$\left(2x-7\right)\left(2x+7\right)$

b)

$\left(4x+7\right)^2$

c)

$\left(4x-7\right)\left(4x+7\right)$

d)

以上皆非

5.

$a^2+8a+16$

a)

$\left(a+4\right)^2$

b)

$\left(a+16\right)^2$

c)

$\left(a+4\right)\left(a-4\right)$

d)

以上皆非

6.

$x^2-25$

a)

$\left(x-5\right)^2$

b)

$\left(x-25\right)^2$

c)

$\left(x-5\right)\left(x+5\right)$

d)

以上皆非

7.

$25x^2+10x+1$

a)

$\left(5x-1\right)^2$

b)

$\left(5x+1\right)^2$

c)

$\left(25x+1\right)^2$

d)

以上皆非

8.

$4x^2-9$

a)

$\left(4x-9\right)\left(4x+9\right)$

b)

$\left(2x+3\right)^2$

c)

$\left(2x+3\right)\left(2x-3\right)$

d)

以上皆非

9.

$9x^2-64$

a)

$\left(9x-8\right)^2$

b)

$\left(3x-8\right)^2$

c)

$\left(9x-8\right)\left(9x+8\right)$

d)

$\left(3x-8\right)\left(3x+8\right)$

10.

$4a^2-6a+9$

a)

$\left(2a-3\right)^2$

b)

$\left(4a+9\right)^2$

c)

$\left(2a+3\right)^2$

d)

以上皆非

11.

$4x^2+4x+1$

a)

$\left(4x+1\right)^2$

b)

$\left(2x+1\right)^2$

c)

$\left(2x-1\right)^2$

d)

以上皆非

12.

$9x^2+18x+16$

a)

$\left(3x+2\right)^2$

b)

$\left(9x+4\right)^2$

c)

$\left(3x+4\right)^2$

d)

以上皆非

13.

$-4x^2+y^2$

a)

$\left(2x-y\right)^2$

b)

$\left(2x-y\right)\left(2x+y\right)$

c)

$-\left(2x-y\right)^2$

d)

$\left(y-2x\right)\left(y+2x\right)$

14.

$\left(x+1\right)^2+4\left(x+1\right)+4$

a)

$\left(x+5\right)^2$

b)

$\left(x+3\right)^2$

c)

$\left(x+2\right)^2$

d)

以上皆非

15.

$x^4-1$

a)

$\left(x^2-1\right)^2$

b)

$\left(x^2\right)^2-1^2$

c)

$\left(x-1\right)\left(x+1\right)\left(x^2+1\right)$

d)

以上皆非

16.

$a^2-b^2=?$

a)

$\left(a-b\right)^2$

b)

$\left(a+b\right)^2$

c)

$\left(a+b\right)\left(a-b\right)$

d)

個人覺得沒有答案

17.

$a^3+b^3=?$

a)

$\left(a+b\right)\left(a^2+ab+b^2\right)$

b)

$\left(a-b\right)\left(a^2+ab+b^2\right)$

c)

$\left(a+b\right)\left(a^2-ab+b^2\right)$

d)

$\left(a+b\right)\left(a^2+ab-b^2\right)$

18.

$\left(a-b\right)^3=?$

a)

$a^3-3ab+3ab^2-b^3$

b)

$a^3-3a^2b+3ab^2-b^3$

c)

$a^3-3a^2b+3ab^2+b^3$

d)

$a^3+3a^2b+3ab^2-b^3$

19.

$a^3-b^3=?$

a)

$\left(a+b\right)\left(a^2+ab+b^2\right)$

b)

$\left(a-b\right)\left(a^2+ab-b^2\right)$

c)

$\left(a-b\right)\left(a^2-ab+b^2\right)$

d)

$\left(a-b\right)\left(a^2+ab+b^2\right)$

20.

$\left(a+b\right)^3=?$

a)

$a^3+3a^2b+3ab^2-b^3$

b)

$a^3+3a^2b-3ab^2+b^3$

c)

$a^3-3a^2b+3ab^2-b^3$

d)

$a^3+3a^2b+3ab^2+b^3$

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