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3-1與3-2 因式分解

Total questions: 20

Worksheet time: 20mins

Name
Class
Date
1.

因式分解16x2 - 9

a)

(4x - 3)2

b)

(8x - 3)2

c)

(4x + 3)(4x - 3)

d)

(8x + 3)(8x - 3)

2.

因式分解 x22x+1x^2-2x+1  的結果為?

a)

(x+1)2\left(x+1\right)^2  

b)

(x1)2\left(x-1\right)^2  

c)

(x+1)(x1)\left(x+1\right)\left(x-1\right)  

d)

x2-1

3.

因式分解25x2 + 5x

a)

5x(5x)

b)

5x(5x + 1)

c)

x(25x + 5)

d)

25x(x + 1)

4.

x2+x12=x^2+x-12=  

a)

(x3)(x+4)\left(x-3\right)\left(x+4\right)  

b)

(x+3)(x4)\left(x+3\right)\left(x-4\right)  

c)

(x+3)(x+4)\left(x+3\right)\left(x+4\right)  

d)

(x3)(x4)\left(x-3\right)\left(x-4\right)  

5.

x22×x×5+52x^2-2\times x\times5+5^2 = 

a)

(x+5)2\left(x+5\right)^2  

b)

(x5)2\left(x-5\right)^2  

c)

(x25)2\left(x-25\right)^2  

d)

(x5)(x+5)\left(x-5\right)\left(x+5\right)  

6.

4x24x+1=4x^2-4x+1=  

a)

(4x+1)2\left(4x+1\right)^2  

b)

(2x+1)2\left(2x+1\right)^2  

c)

(2x1)2\left(2x-1\right)^2  

d)

(4x1)2\left(4x-1\right)^2  

7.

4x2+y2=-4x^2+y^2=  

a)

(2xy)2\left(2x-y\right)^2  

b)

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

c)

(2xy)2-\left(2x-y\right)^2  

d)

(y2x)(y+2x)\left(y-2x\right)\left(y+2x\right)  

8.

展開化簡 (x+2)(x+3) 的結果為何?

a)

x2 +6x+5

b)

x2 +5x+6

c)

x2 +2x+3

d)

x2 +7x+6

9.

x2pxq=(xa)(xb),則下列何者正確?(複選題)

a)

a+b=p

b)

a+b=q

c)

ab=p

d)

ab=q

10.

已知多項式3x2+8x+4可因式分解成(3x+2)(xm),則m為多少?

a)

3

b)

4

c)

2

d)

1

11.

x2+6x187=x^2+6x-187=  

a)

(x11)(x+17)\left(x-11\right)\left(x+17\right)  

b)

(x11)(x17)\left(x-11\right)\left(x-17\right)  

c)

(x+11)(x+17)\left(x+11\right)\left(x+17\right)  

d)

(x+11)(x17)\left(x+11\right)\left(x-17\right)  

12.

因式分解 6a32a6a^3-2a  

a)

a(6a22)a\left(6a^2-2\right)  

b)

2a(3a21)2a\left(3a^2-1\right)  

c)

2a(3a2)2a\left(3a^2\right)  

d)

2(3a3a)2\left(3a^3-a\right)  

13.

因式分解 (x−y) − (x−y)2

a)

(x−y)(1−x+y)

b)

(x−y)(−x+y)

c)

(x−y)(−x−y)

d)

(x−y)(1−x−y)

14.

因式分解 (x−y)2 + b(x − y)

a)

(x − y)(x − y + b)

b)

(x − y)(2 + b)

c)

(x − y)(1 + b)

d)

2(x − y)(x + b)

15.

1100a21-100a^2  

a)

(10a+1)(10a1)\left(10a+1\right)\left(10a-1\right)  

b)

(1+10a)(110a)\left(1+10a\right)\left(1-10a\right)  

c)

(1+100a)(1100a)\left(1+100a\right)\left(1-100a\right)  

d)

(1+10a2)(110a2)\left(1+10a^2\right)\left(1-10a^2\right)  

16.

因式分解4x2 - 100

a)

(2x - 10)2

b)

2(x - 5)2

c)

(2x + 10)(2x - 10)

d)

4(x - 5)(x + 5)

17.

kk  為整數,則下列何者不可能為 x2+kx36x^2+kx-36  的因式?

a)

x9x-9  

b)

x8x-8  

c)

x+18x+18  

d)

x+3x+3  

18.

若因式分解 x2+kx10=(x+5)(x2)x^2+kx-10=\left(x+5\right)\left(x-2\right)  ,則 k=k=  ?

a)

b)

c)

d)

  10-10  

19.

以知 2x2+x1=(x+1)(2x1)2x^2+x-1=\left(x+1\right)\left(2x-1\right)  ,則下列哪些是 2x2+x12x^2+x-1  的因式(複選)

a)

x+1x+1  

b)

2x+12x+1  

c)

x1x-1  

d)

(2x1)(x+1)\left(2x-1\right)\left(x+1\right)  

e)

12x1-2x  

20.

請在圓圈內畫出現在的心情,票選前3名創意表情加分!