因式分解与配方法练习.doc

文档介绍：。-2xy-35y2=-7x-15=-43xy+14y2=-19x+5=-13x+6=+4xy-28y2=7.-35m2n2+11mn+6=+11a-35a2=-11a-35a2=+(   )+14y2=(4x-7y)(5x-2y).-3xy-(   )=(x-7y)(x+4y).+(   )-28y2=(x+7y)(x-4y).+(   )-21y2=(x-7y)(x+3y).+5x-6=(3x-2)(   ),k=+5x-k=(3x-2)(   ),k=+kx-6=(3x-2)(   ),k=-19x+5=(9x+m)(2x+n),则m=_____,n=+19x+m=(9x+5)(2x+n),则m=_____,n=-4x3+4x2-1=-3x-6xy+9y=-9ax2+6xy2-14ay2=+a2b+a2c+abc=(x+y)2+(x+m)2-(m+n)2-(y+n)2=____.