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【正文】 = _____________; 3(x+11)(x-20)=_____________; 3(x-5)(2x+3)=_______________; 3(a-1)(a+1)=________________; 3(m-2)(m+2)=_____________; (2n-3)(2n+3)=_____________; 499101=[(_____)]-[(_____)][(_____)+(_____)] =( )2-( )2=_________; 420031997=[(____)+(_____)][(_____)-(____)]=( )2-( )2=______; 4(a-bc)(a+bc)=_____________; 4198202=______________; 4(m-30)(m+30)=____________; 4(t-) (t+ )=_____________; 4(2x-9)(2x+9)=______________; 4(x- y)(x+ y)=____________; 4(2x-3t)(2x+3t)=___________; 50、(3x-7)(3x+7)=___________; 5(-2m+n)(n+2m)=____________; 5(-5p-3)(5p-3)=___________; 5(x2-y)(x2+y)=______________; 5(y+12)2=_____________; 5(2a+3)3=_____________; 5(3x-4)2=____________; 5(3a-2b)2=____________; 5(4x+5y)2=___________; 5(ab-4c)2=____________; 60、(3a-1)2=____________; 6(2x+5y)2=____________; 6(ab-12)2=__________; 6(-a2+b2)=___________; 62a-4b=______________; 6ax-ay=________________; 6y2-3y=______________; 65y2+10y=_______________; 636x2-12x+1=(________)2; 6x2+22x+121=(__________)2 70、如果x2-mx+16=(x-4)2,那么m=___________. 7x3-10x2+25x=
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