《第1章一元二次方程》能力达标专题突破训练2021-2022学年九年级数学苏科版上册

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B

C

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Bmm1

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D2

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BAD

C

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xx1

B

xx+145Cx1

Dxx

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*

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23120192021215.464124①80

②cm25xx2mx+01m2x+x56m26x2x+2kx+1230

22227

②4+10y+2+5+y5③①③23+yy1①x12xy+4y+

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xx+2

2

40c1+1mxx+1﹣mm0yy3x3x

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2

x

b0a+400AD201910001+C

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18

*

①+0a*bb*a②x*x+1+2+2+1③x*1+3

xxx+6x+31x+61x+5x0x④①④1924x20x420x30xxx220m100m5m5m5+202121x

k

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xx

2+1023x1+x

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