人教版初中九年级数学上册配方法解一元二次方程综合练习题49Word格式.docx
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二、解下列方程。
x2+18+1=0x2-4+10=0
6x2+12x+10=04x2-8x-10=0
x2+2x+3-6x=12x2-2x-10+7x=14
x(x+7)=3x+19x(x+3)=7x+14
4x2+10x-5=02x2-2x+10=0
1
x2+x+—=0x2+18+7=0
4
(2)x2+5x+____=(x+____)2
10
(3)x2+—x+____=(x+____)2
9
x2+14+5=0x2+12+5=0
7x2-14x+8=02x2-4x-2=0
x2+4x-3-7x=19x2+8x+4+3x=16
x(x-2)=6x-10x(x-8)=6x-3
4x2+2x+5=02x2+4x+10=0
x2+x-—=0x2-6+5=0
(1)x2+20x+____=(x+____)2
(2)x2-7x+____=(x-____)2
2
3
x2-2+6=0x2-18+5=0
5x2-10x+4=010x2+20x-8=0
x2-6x+4+8x=15x2-8x-10+6x=14
x(x-5)=8x+15x(x+7)=3x+10
4x2-2x-5=02x2+10x-4=0
x2-x-—=0x2-8+10=0
(1)x2-18x+____=(x-____)2
(2)x2-10x+____=(x-____)2
5
x2+16+10=0x2-14+4=0
2x2+4x-2=03x2-6x-2=0
x2+2x-6+7x=12x2-6x+2-5x=13
x(x+2)=6x+5x(x+1)=7x-15
2x2-2x-7=02x2+10x+9=0
x2+x+—=0x2+20+2=0
(1)x2+4x+____=(x+____)2
(2)x2-6x+____=(x-____)2
x2-6+2=0x2-2+3=0
4x2+8x-6=09x2+18x-8=0
x2+4x+5+7x=16x2+6x-9+5x=10
x(x-3)=5x-10x(x-5)=8x+7
4x2-10x+5=04x2-8x-7=0
x2+x+—=0x2+20+5=0
(1)x2-10x+____=(x-____)2
(2)x2+7x+____=(x+____)2
x2-6+3=0x2+2+1=0
7x2+14x+6=09x2-18x+10=0
x2-4x-3+2x=20x2+10x+4-9x=16
x(x+8)=2x-4x(x+2)=5x-18
4x2-4x-2=06x2+8x-8=0
x2-x+—=0x2+14+7=0
(1)x2+14x+____=(x+____)2
x2+12+6=0x2+18+2=0
7x2-14x+10=010x2-20x-10=0
x2-4x-1-9x=19x2-2x+1+2x=16
x(x+3)=4x+1x(x+7)=5x+18
4x2-8x-7=06x2-2x-3=0
x2+x+—=0x2-4+4=0
(2)x2+10x+____=(x+____)2
x2-4+6=0x2-8+2=0
4x2-8x+2=09x2+18x-2=0
x2-2x-9+6x=20x2+2x+10+9x=19
x(x-2)=7x+12x(x-4)=3x-20
4x2-4x+2=06x2+2x-3=0
x2+x+—=0x2-6+8=0
(1)x2-8x+____=(x-____)2
x2+18+10=0x2+6+7=0
7x2-14x-10=010x2-20x-4=0
x2+6x-10+2x=19x2-2x-9-6x=20
x(x+7)=6x-9x(x-5)=6x+9
2x2-10x+4=04x2-10x+4=0
x2-x+—=0x2-12+1=0
(2)x2+6x+____=(x+____)2
x2-20+3=0x2-18+2=0
9x2-18x+8=07x2-14x-2=0
x2-10x+8+3x=14x2-4x-4-9x=13
x(x+8)=2x-7x(x-5)=8x-3