因式计算:x平方-y平方-ax ay-搜答案-智慧作业帮

原式=(x+y)(x-y)/(x-y)^2=(x+y)/(x-y)=120/100=1.2^2指平方

x^2/25-y^2/16=(x/5-y/4((x/5+y/4)16x^2+4x+0.25=16x^2+4x+1/4=(4x+1/2)^2

(x+y)^2-(x-y)^2={(x+y)+(x-y)}{(x+y)-(x-y)}=2x*2y=4xy

=[5(x＋y)]²－[4(x－y)]²=(5x＋5y＋4x－4y)(5x＋5y－4x＋4y)=(9x＋y)(x＋9y)

12m(x+y)的3次方-9n(x+y)的平方=3（x+y）²（4mx+4my-3n）如果本题有什么不明白可以追问,

1x²+2xy-3y²=x²+2xy+y²-4y²=（x+y）²-(2y)²=(x+y+2y)(x+y-2y)=(x+3y)(x-

=7x²-4x²+4xy-y²=7x²-(2x-y)²=(√7x+2x-y)(√7x-2x+y)本题答案不唯一的

^3代表3次方,^2代表平方X^3+X^2-Y^3-Y^2=(x^3-y^3)+(x^2-y^2)=(x-y)(x^2+xy+y^2)+(x-y)(x+y)=(x-y)(x^2+xy+y^2+x+y)

=x^3-y^3-(x^3+y^3)=-2y^3^3表示三次方

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

题目有问题吧,我感觉应该是(x²+y²-z²)²-4x²y²(x²+y²-z²)²-4x²

(x+y)^3-y(x+y)^2+x^2(y+x)=(x+y)[(x+y)^2-y(x+y)+x^2]=(x+y)(x^2+2xy+y^2-xy-y^2+x^2)=(x+y)(2x^2+xy)=x(x

(x-y)^2-(y-x)^3=(x-y)^2+(x-y)^3=(x-y)^2(x-y+1)

(x+3y)(x-y)

=[(x+y)-2y]²=(x-y)²

x²-4y²=x²-（2y）²=（x+2y）（x-2y）这里用到了平方差公式.很高兴为您解答,祝你学习进步!如果我的回答对你有帮助,请及时选为满意答案,谢谢~~

(x^2+4y^2)^2-16x^2y^2＝(x+4y)-(4xy)=(x+4y+4xy)(x+4y-4xy)=(x+2y)(x-2y)请采纳回答

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)

（x+y)的平方-6x的平方+6y的平方+9(x-y)的平方=(x+y)²-6(x²-y²)+9(x-y)²=(x+y)²-6(x+y)(x-y)+9

x^2-y^2+ax+ay=(x+y)(x-y)+a(x+y)=(x+y)(x-y+a)