作业帮分解因式:x(b c-d)-y(d-b-c)-2c 2d-2b
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x²-4y²+x-2y=(x²-4y²)+(x-2y)=(x-2y)(x+2y)+(x-2y)=(x-2y)(x+2y+1)很高兴为您解答,祝你学习进步!【学习
解9(x-y)²-y²=[3(x-y)]²-y²=[3(x-y)-y][3(x-y)+y]=(3x-4y)(3x-2y)
a(y-x)-2b(x-y)=a(y-x)+2b(y-x)=(y-x)(a+2b)
=(x-3y)²-3(x-3y)=(x-3y)(x-3y-3)
1、x(b+c-d)-y(d-b-c)-2c+2d-2b=x(b+c-d)-y(-（-d+b+c）)-2（c-d+b）=x(b+c-d)+y(b+c-d)-2（b+c-d）=（x+y-2）*（b+c-
=[5(x＋y)]²－[4(x－y)]²=(5x＋5y＋4x－4y)(5x＋5y－4x＋4y)=(9x＋y)(x＋9y)
一：a(x-y)-x+y=a(x-y)-(x-y)=(a-1)(x-y)二：1.22²×3²-1.33²×4=（1.22×3）²-（1.33x2）²=
原式=x²-Y²-x-5y-6=(x²-x+1/4)-(Y²+5y+25/4)=(x-1/2)²-（Y+5/2)²=[(x-1/2)+(Y+
x^2-x-4y^2+2y=(x^2-4y^2)-(x-2y)=(x+2y)(x-2y)-(x-2y)=(x-2y)(x+2y-1)
把x+y当做一个因子,7当做一个因子（x+y）^2-14(x+y)+49=（x+y）^2-2*7*(x+y)+7^2=(x+y-7)^2
X(b+c-d)-y(d-b-c)-b-c+d=X(b+c-d)+y(b+c-d)-(b+c-d)=(b+c-d)(X+y-1)
原式=[3(x+y)]²-(x-y)²=[3(x+y)+(x-y)][3(x+y)-(x-y)]=(4x+2y)(2x+4y)=4(2x+y)(x+2y)
你的式子是无法分解的,已经是最简代数式了x^2-xy+y^2=（x-y/2）^2+3y^2/4恒大于0,无法分解
分解为ax+ay+bx+by-ax+ay-bx+by=ay+by+ay+by=2ay+2by=2y(a+b)
16(x-y)²-9(x+y)²=【4（x-y）+3(x+y)】【4(x-y)-3(x+y)】=(7x-y)(x-7y)在我回答的右上角点击【评价】,然后就可以选择【满意,问题已经
(x+y)^4+(x+y)^2-20＝[﹙x＋y﹚²＋5﹚][﹙x＋y﹚²－4]＝﹙x²＋2xy＋y²＋5﹚﹙x＋y－2﹚﹙x＋y＋2﹚
(2x+y)^2-(x+2y)^2=[(2x+y)-(x+2y)][(2x+y)+(x+2y)]=(2x+y-x-2y)(2x+y+x+2y)=(x-y)(3x+3y)=3(x-y)(x+y)
:a(3x+9y)-x-3y=3a(x+3y)-(x+3y)=(3a-1))(x+3y)
(x+2y)²+x+2y=（x+2y)²+(x+2y)=(x+2y)(x+2y+1）
16(X+Y)平方-9(Y-X)平方=[4(x+y)]²-[3(y-x)]²=[4x+4y-3y+3x][4x+4y+3y-3x]=(7x+y)(x+7y)