(x的平方-y的平方)÷(x-y)等于-搜答案-搜搜考试网

原式=(x²+y²+2xy)(x²+y²-2xy)/(x+y)²=(x+y)²(x-y)²/(x+y)²=(x-y)&#

=-(x+2y)(x-2y)/(x+y)²×2x(x+y)/(x-2y)=-2x(x+2y)/(x+y)=-(2x²+4xy)/(x+y)

25(x+y)的平方-9(x-y)的平方=[5(x+y)+3(x-y)][5(x+y)-3(x-y)]=(8x+2y)(2x+8y)=4(4x+y)(x+4y)

2x(-xy)^2-x^2(x^2y^2-y^2)=(xy)^2(2x-x^2+1)

(x平方+y平方)平方-y平方=x平方+6所以（x²＋y²）²-（x²＋y²）-6=0（x²＋y²＋2）（x²＋y

(（x-y）(x-y))/((x-y)(x+y))=(x-y)/(x+y).

=(x+y)(x-y)/(x+y-1)(x-y+1)×(x-y+1)(x-y-1)/(x+y)²×(x+2y)(x-y)/x(x-y)=(x-y-1)(x+2y)(x-y)/x(x+y-1)

[x(xy-xy)-y(x-xy)]/3xy=(xy-xy-xy+xy)/3xy=(2xy-2xy)/3xy=(2xy-2)/3请点击

=(x+2y)(x-2y)/(x+y)×1/x(x-2y)×(x+y)(x-y)/(x+2y)(x-y)=1/x

【2（x-y）²-8（x-y)²（x+y）+6y（x-y）²】÷2（x-y）²=2（x-y）²÷2(x-y)²-8（x-y)²（x

x的平方乘y的平方-4-2x的平方乘y的平方=-x的平方乘y的平方-4

(x^2+y^2)^2-4x^2y^2=(x^2+y^2+2xy)(x^2+y^2-2xy)=(x+y)^2*(x-y)^2=(x^2-y^2)^2数学佰亊嗵为你解答,希望我的回答为您带来帮助!

x8＋256y8-32x4y4(用手机打的不要介意,给个最佳答案吧）

∵4x²-y²+2x-y=(2x-y)(2x+y)+(2x-y)=(2x-y)(2x+y+1)∴4x²-y²+2x-y=(2x-y)(2x+y+1)不懂得欢迎追

36(x+y)²-49(x-y)²=[6(x+y)+7(x-y)][6(x+y)-7(x-y)]=(6x+6y+7x-7y)(6x+6y-7x+7y)=(13x-y)(-x+13y

a(x²+2xy+y²)-b（x²-y²）=a（x+y）²-b（x+y）（x-y）=（x+y）（ax+ay-bx+by）再问：你确定对吗？和我已开始算

（1-y+x分之y）÷y的平方-x的平方分之x=[(y+x-y)/(y+x)]÷x/(y²-x²)=x/(y+x)*[(y+x)(y-x)/x]=y-x

x的平方-x-4y的平方+2y=(x-2y)(x+2y)-(x-2y)=(x-2y)(x+2y-1)

(x平方+2xy+y的平方）/（x+y)=（x+y)²/(x+y)=x+y