人教版初中九年级数学上册公式法解一元二次方程综合练习题21.docx
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人教版初中九年级数学上册公式法解一元二次方程综合练习题21.docx
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人教版初中九年级数学上册公式法解一元二次方程综合练习题21
x2+3x+7=04x2+3
x-6=0
3x2+10x+9=0x2+5x=15
4x2-7x=x-8x2-10x+1=0
4x2-4x-2=06x2-6x=0
x2+4x-7=4x-3x(4x+4)=9+2x
x2+7x+9=03x2+2
x-1=0
4x2-7x+8=0x2-10x=18
4x2-9x=x+5x2+8x-9=0
4x2+4x-1=09x2+10x=0
x2-7x+8=2x-9x(2x+1)=7-3x
x2+9x+8=04x2-3
x-5=0
3x2+3x+10=0x2-6x=10
2x2-3x=x+10x2+2x-4=0
2x2+8x+6=08x2-10x=0
x2-8x+3=6x+8x(4x+4)=3+3x
x2+6x+9=02x2+3
x+10=0
3x2-5x+1=0x2-6x=20
2x2-4x=x-1x2+4x+2=0
2x2+3x+2=09x2-7x=0
x2-10x-2=7x-1x(4x-5)=6-5x
x2-9x+7=04x2-2
x-1=0
2x2-2x+10=0x2-10x=16
3x2+2x=x+3x2+3x-8=0
2x2+6x+6=09x2-7x=0
x2+8x+5=6x-10x(2x+4)=5-8x
x2-9x+6=04x2-4
x-8=0
2x2-9x-1=0x2-9x=15
2x2-2x=x+9x2+8x+9=0
2x2-5x+1=06x2+5x=0
x2-7x+7=4x-1x(2x-3)=1-6x
x2-3x+4=02x2+2
x+1=0
3x2+9x-7=0x2-8x=18
2x2-6x=x-2x2-6x+8=0
4x2+9x-2=04x2-9x=0
x2+6x+4=8x-6x(2x-1)=8-6x
x2+9x-2=04x2-3
x+3=0
4x2+10x-7=0x2+9x=12
3x2-2x=x+2x2+9x+6=0
4x2-6x+6=05x2+8x=0
x2-10x-6=8x-8x(3x-5)=1+2x
x2+3x-8=04x2-2
x+2=0
2x2+6x+4=0x2-5x=7
4x2-3x=x-8x2-10x+3=0
4x2+7x+8=08x2+5x=0
x2-10x-5=4x-9x(3x-5)=4-4x
x2-5x-10=03x2-2
x-7=0
2x2+4x+5=0x2+3x=16
4x2-3x=x+8x2+7x-9=0
3x2+5x-10=02x2-4x=0
x2+5x-6=9x-3x(4x+5)=5-9x
x2+2x+9=03x2+4
x+5=0
3x2+7x+10=0x2+8x=10
4x2+3x=x+7x2+8x+9=0
2x2+5x+8=09x2+2x=0
x2+10x+10=9x-3x(4x-3)=3-2x
x2+5x+5=03x2-2
x+7=0
2x2+9x-10=0x2-9x=1
4x2+4x=x-7x2+7x-4=0
3x2-8x-7=09x2-4x=0
x2+7x-6=6x+10x(3x-1)=9-6x
x2-9x+10=04x2+4
x-4=0
4x2-4x-6=0x2-8x=17
3x2+9x=x-1x2-9x+1=0
3x2+3x+4=06x2-10x=0
x2+6x+9=4x-10x(3x+1)=6+5x
x2-2x-8=02x2+4
x-10=0
3x2+3x-4=0x2-3x=17
4x2+9x=x-4x2-7x+8=0
2x2+6x-10=09x2+5x=0
x2+9x-4=3x+6x(4x-1)=7-6x
x2+2x-7=02x2+2
x+9=0
3x2+3x-5=0x2-8x=5
4x2+7x=x-3x2+2x-3=0
3x2+7x+6=07x2+6x=0
x2+2x-9=2x+2x(3x-5)=3+2x
x2+3x-1=02x2+4
x+2=0
2x2+3x+6=0x2+8x=18
3x2-8x=x+8x2-2x-10=0
3x2+9x+4=04x2-4x=0
x2+4x+7=3x-1x(4x+2)=9-2x
x2-10x+3=03x2+3
x+7=0
3x2+4x-1=0x2+9x=20
2x2-5x=x-7x2+10x+10=0
2x2-4x+7=05x2+7x=0
x2+10x+2=7x-10x(4x-4)=9-4x
x2-10x-10=04x2+2
x-4=0
4x2-5x+4=0x2+5x=14
3x2+5x=x-8x2-4x+2=0
3x2+2x-1=05x2-2x=0
x2+3x-10=4x-10x(4x+3)=1+5x
x2-5x-5=04x2+4
x+5=0
4x2-10x-5=0x2+9x=12
4x2+10x=x-9x2-4x-8=0
3x2-3x+3=02x2+10x=0
x2+4x+3=5x-2x(2x-1)=8-7x
x2-9x-2=02x2-4
x-2=0
3x2+2x-1=0x2+2x=7
2x2+3x=x+10x2-3x-4=0
4x2+9x-7=02x2+5x=0
x2-9x+7=3x+8x(3x-3)=2-6x
x2+8x-6=03x2+4
x+8=0
3x2+7x+5=0x2-2x=12
4x2+9x=x+9x2+4x+7=0
4x2-3x-9=07x2-3x=0
x2-2x+8=2x+5x(3x+1)=7+8x
x2-9x+9=02x2+2
x+1=0
4x2-7x+3=0x2-9x=5
4x2+4x=x+5x2+7x+5=0
2x2-4x+4=04x2+7x=0
x2-7x+9=6x-1x(2x+3)=7+2x
x2+7x+2=02x2+3
x+10=0
3x2+10x+8=0x2+4x=14
2x2+7x=x-4x2+3x-4=0
3x2-10x+4=05x2-6x=0
x2-4x+1=5x+2x(3x+3)=2+8x
x2+6x+6=04x2-3
x+3=0
3x2+10x-7=0x2-7x=20
3x2-7x=x-6x2+2x+7=0
2x2+6x-7=06x2-8x=0
x2-4x+1=7x+1x(2x+3)=4+7x
x2+9x+9=04x2+4
x-6=0
2x2+6x-7=0x2-2x=11
4x2+9x=x-10x2+5x+4=0
2x2+4x+3=03x2+3x=0
x2-10x-4=3x+10x(4x+5)=4+4x
x2-7x+10=04x2-2
x+3=0
2x2-3x+4=0x2-5x=12
2x2+8x=x+5x2-8x-3=0
2x2-4x+7=06x2-7x=0
x2-6x-6=6x-9x(3x-3)=4-6x
x2+10x-2=03x2+2
x+1=0
2x2-7x+10=0x2-6x=14
2x2+2x=x-1x2+4x+10=0
2x2+6x-6=05x2+4x=0
x2-5x+5=3x+3x(2x+3)=5+3x
x2-5x+1=02x2+3
x+10=0
4x2-6x-7=0x2+6x=3
2x2-2x=x-10x2+2x-5=0
2x2-7x+2=04x2+7x=0
x2-7x+3=4x+10x(4x-4)=9-8x
x2-2x+10=03x2+2
x+1=0
2x2+9x+8=0x2-3x=17
4x2-6x=x+1x2+7x-6=0
3x2+6x-3=09x2-8x=0
x2-10x+1=8x-9x(4x-5)=7-8x
x2+10x+4=02x2+3
x-10=0
4x2+3x-2=0x2-4x=19
4x2-2x=x-5x2-9x-3=0
3x2+4x-5=04x2+7x=0
x2+6x+2=5x-2x(4x-1)=3-4x
x2-8x+1=03x2-2
x-6=0
4x2+10x-6=0x2-3x=14
2x2-4x=x+5x2+2x+4=0
2x2+2x-6=03x2+7x=0
x2+5x+7=8x-9x(4x+4)=1-4x
x2+3x-2=02x2-3
x+3=0
3x2-3x-7=0x2+2x=15
3x2+4x=x+9x2+9x+2=0
3x2-2x-8=02x2-2x=0
x2-6x+6=8x+7x(4x-4)=3+5x
x2-7x-10=03x2-2
x-3=0
3x2+7x-8=0x2-8x=6
3x2-10x=x+10x2-8x+8=0
3x2-2x-6=02x2-4x=0
x2+4x-8=4x+1x(3x-4)=6+6x
x2+3x+7=02x2-4
x-4=0
2x2-8x-6=0x2+6x=4
3x2-8x=x-7x2+7x+10=0
3x2+4x+10=02x2-2x=0
x2-4x-1=4x-10x(3x-2)=1+9x
x2-9x+6=02x2-2
x-2=0
3x2+2x-8=0x2+6x=7
4x2+3x=x-9x2+4x-8=0
4x2-3x+10=07x2+4x=0
x2-7x-9=9x-9x(3x-5)=1-6x
x2-6x-10=04x2-4
x-9=0
3x2-8x+6=0x2+8x=13
3x2-7x=x+6x2+3x+4=0
2x2+8x-2=07x2+7x=0
x2+10x+6=8x-8x(3x-2)=4+3x
x2-3x+5=02x2-2
x+8=0
3x2+10x+10=0x2-9x=19
2x2+7x=x-1x2+9x-1=0
3x2+2x+7=09x2-5x=0
x2-3x+5=8x+4x(2x-3)=1+7x
x2+5x-7=02x2-2
x-5=0
2x2+7x+1=0x2+4x=19
2x2-8x=x-5x2-5x+1=0
4x2-10x-8=08x2-10x=0
x2+3x+7=9x+2x(3x+5)=9-3x
x2-6x+10=03x2-4
x-5=0
3x2+4x+4=0x2-9x=8
3x2+10x=x+4x2-5x+3=0
3x2-3x-6=09x2+4x=0
x2-9x+7=4x+5x(4x+1)=6+2x
x2+6x-3=04x2+4
x-5=0
4x2+9x+1=0x2-9x=3
3x2-6x=x-4x2+2x+9=0
4x2-5x-2=08x2-6x=0
x2+6x+1=7x-2x(2x+5)=3+9x
x2+9x-1=03x2-4
x-2=0
2x2-5x-8=0x2-10x=9
3x2-3x=x-7x2+10x+6=0
3x2+6x+3=06x2-5x=0
x2+6x-4=9x-8x(4x+2)=2+3x
x2+7x-3=03x2-3
x+5=0
2x2-5x-7=0x2-10x=15
3x2-7x=x-10x2-6x+10=0
4x2-2x-8=08x2-10x=0
x2+8x-4=6x-9x(3x+1)=2-3x
x2+6x+9=02x2+3
x+6=0
2x2+6x+1=0x2-4x=14
3x2+2x=x-8x2+7x-8=0
3x2-7x+1=04x2+9x=0
x2-10x-1=9x+10x(2x-1)=7+7x
x2+8x-2=02x2-2
x-3=0
4x2+8x-2=0x2+9x=5
4x2+4x=x-3x2-5x-4=0
2x2+7x-2=05x2+10x=0
x2+5x-9=3x-6x(4x+2)=3-3x
x2+3x+2=02x2+3
x+6=0
4x2+7x+5=0x2-2x=4
2x2+8x=x+6x2-7x-5=0
2x2+10x-2=02x2+2x=0
x2+10x+10=3x+7x(2x-3)=2+6x
x2-5x+5=03x2+3
x+9=0
3x2-3x-2=0x2-2x=8
4x2-2x=x+7x2-10x-10=0
2x2-10x-3=07x2+6x=0
x2+7x-1=7x-2x(3x-3)=4+2x
x2+6x-5=03x2-2
x-8=0
4x2-8x-2=0x2-2x=11
2x2+5x=x-6x2+7x+10=0
4x2+4x+4=09x2-3x=0
x2+3x-3=4x-9x(3x-5)=6-5x
x2+5x+2=02x2-2
x-7=0
3x2-8x-3=0x2-5x=9
3x2-4x=x-1x2-4x-5=0
4x2-5x+9=09x2+5x=0
x2+6x-6=6x-5x(3x+1)=9+3x
x2-2x+4=03x2-3
x+1=0
4x2-9x-4=0x2+8x=7
3x2-4x=x-3x2+9x-2=0
2x2+10x-10=04x2+9x=0
x2+8x-3=7x+1x(2x+1)=5-5x
x2+5x+6=02x2+3
x+1=0
3x2-10x-6=0x2+9x=10
2x2-6x=x+4x2-9x+7=0
3x2+6x-2=07x2-8x=0
x2-4x-3=9x+8x(4x-4)=8+6x
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