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

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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