人教版初中九年级数学上册第一单元一元二次方程综合练习题9Word下载.docx
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人教版初中九年级数学上册第一单元一元二次方程综合练习题9Word下载.docx
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x2+4
x+1=02x2-9=6x2+10x
五、用公式法解下列方程。
x2-x+2=0x2+3x-2=7x-1
x2+6
x-1=0x(x-3)=3+6x
x2+17x=0x2+6
x-3=0
六、用因式分解法解下列方程。
5x2-30x=-4516x2-289=0
4x(x-1)=7(x-1)(9x-9)2=(9-x)2
七、求下列方程两个根的和与积。
x2-x-1=152x2+x-3=0
x2+x=x+6x2-7=x+8
36x2-169=0(x-6)2=81
36x2=49x2-10x+25=64
(1)x2+8x+____=(x+____)2
(2)x2-4x+____=(x-____)2
(4)25x2+10x+____=(5x+____)2
x2+6x+8=03x2+6x-4=0
x2-x-—=02x2-x-8=0
3x2+7x-—=020x2+10x-20=0
x2-5
x-4=05x2-10=8x2-8x
x2+x-10=0x2-3x-9=6x+4
x2+2
x-5=0x(x+1)=9-4x
x2-17x=0x2+4
x-2=0
5x2+20x=-2025x2-400=0
4x(x+5)=2(x+5)(x-4)2=(3+x)2
x2+6x-4=65x2+x+5=0
3x2-7x=x+18x2-8=x-1
16x2-169=0(x-1)2=1
49x2=64x2-6x+9=81
(1)x2+12x+____=(x+____)2
(2)x2+5x+____=(x+____)2
2
(3)x2+—x+____=(x+____)2
3
(4)25x2-10x+____=(5x-____)2
x2-10x+3=05x2+10x-20=0
19
x2-x-—=06x2-x-8=0
1
7x2+8x-—=010x2+15x-10=0
x2+3
x+6=05x2-2=6x2+7x
x2-x-2=0x2+5x-5=8x-2
x2+5
x-9=0x(x-9)=1-8x
x2-16x=0x2+3
x-4=0
3x2+6x=-39x2-361=0
2x(x-2)=9(x-2)(x+4)2=(5-8x)2
x2+x+6=18x2-8x-5=0
x2+x=x-57x2-6=x-9
25x2-81=0(x-9)2=1
9x2=81x2+14x+49=4
(1)x2+14x+____=(x+____)2
(2)x2-7x+____=(x-____)2
5
(4)16x2-48x+____=(4x-____)2
x2+14x+48=05x2+10x-1=0
x2+x-—=05x2-x-5=0
6x2-6x-—=06x2+6x-8=0
x+8=05x2+6=7x2+1x
x2-x+7=0x2+4x-4=9x+9
x-3=0x(x+2)=6-8x
x2+16x=0x2+4
x+1=0
2x2+8x=-881x2-25=0
5x(x+8)=9(x+8)(x-9)2=(3+3x)2
x2-5x+2=209x2+8x-5=0
x2-x=x-5x2+2=x-6
25x2-256=0(x+9)2=36
49x2=225x2+8x+16=16
(2)x2-8x+____=(x-____)2
(4)16x2+56x+____=(4x+____)2
x2-20x+8=03x2-6x-10=0
15
x2+x-—=03x2-x-1=0
4x2+7x-—=048x2-24x-24=0
x-7=05x2-9=6x2-3x
x2+x-8=0x2-4x-4=6x-5
x-8=0x(x+9)=1-7x
x2-10x=0x2-4
x-6=0
5x2-20x=-204x2-1=0
5x(x-5)=5(x-5)(3x+6)2=(1+x)2
x2+x+4=63x2+x-9=0
7x2+4x=3x+68x2-2=x-8
25x2-256=0(x-3)2=64
36x2=100x2-12x+36=36
(1)x2+6x+____=(x+____)2
(4)9x2-24x+____=(3x-____)2
x2+2x+1=02x2+4x-19=0
13
x2-x-—=05x2-x-8=0
3x2-5x-—=08x2+8x-16=0
x-5=02x2+3=8x2+2x
x2-x+6=0x2-2x-9=6x+9
x2-6
x-5=0x(x+2)=9-9x
x2-3x=0x2+5
x-9=0
6x2+12x=-649x2-49=0
4x(x+3)=7(x+3)(5x-8)2=(5+9x)2
x2-x+9=48x2-x-1=0
x2-4x=x+3x2-8=7x+5
81x2-289=0(x-1)2=81
100x2=169x2-14x+49=9
(1)x2+18x+____=(x+____)2
(2)x2+8x+____=(x+____)2
(4)9x2+30x+____=(3x+____)2
x2-6x+8=05x2+10x-5=0
x2-x-—=05x2+x-8=0
4x2-2x-—=018x2-6x-30=0
x+8=02x2-5=8x2+10x
x2-x+1=0x2+4x-8=9x-2
x2-4
x-5=0x(x+2)=7-8x
x2+11x=0x2-4
x-1=0
5x2+10x=-581x2-169=0
6x(x-6)=3(x-6)(x+1)2=(8-x)2
x2+x+5=4x2-x-9=0
4x2+x=5x+37x2+7=9x-6
36x2-1=0(x+7)2=16
25x2=4x2-14x+49=100
(1)x2+2x+____=(x+____)2
6
(4)16x2+48x+____=(4x+____)2
x2+6x+2=04x2-8x-8=0
x2-x-—=02x2-x-1=0
8x2-5x-—=018x2-18x-60=0
x2-3
x+6=02x2+9=9x2-7x
x2-x+5=0x2-5x-7=9x-5
x-9=0x(x+7)=5-7x
x2-18x=0x2+5
x+7=0
6x2-36x=-5481x2-400=0
4x(x+6)=2(x+6)(x+9)2=(4-7x)2
x2+7x-5=15x2-x+4=0
7x2-3x=x+9x2-4=7x-3
49x2-100=0(x+8)2=49
64x2=49x2-10x+25=49
(1)x2-18x+____=(x-____)2
(2)x2-5x+____=(x-____)2
(4)9x2+54x+____=(3x+____)2
x2-6x+4=02x2+4x-18=0
11
x2-x-—=04x2-x-7=0
9
3x2-9x-—=010x2+12x-14=0
x-10=04x2-8=8x2+8x
x2+x-10=0x2-2x-9=8x+4
x2-2
x-2=0x(x+2)=1-8x
x2-11x=0x2-3
3x2+18x=-274x2-289=0
6x(x+7)=7(x+7)(x-9)2=(1-4x)2
x2-x-4=129x2-3x+9=0
x2-4x=3x+2x2+5=8x-2
100x2-324=0(x-4)2=16
36x2=81x2+8x+16=81
(1)x2-8x+____=(x-____)2
(4)16x2+8x+____=(4x+____)2
x2-8x+9=05x2+10x-4=0
x2+x-—=06x2-x-5=0
四、利用判
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