(7x^2+2y^2)^2-(2X^2+7Y^2)^2因式分解

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(7x^2+2y^2)^2-(2X^2+7Y^2)^2因式分解(7x^2+2y^2)^2-(2X^2+7Y^2)^2因式分解(7x^2+2y^2)^2-(2X^2+7Y^2)^2因式分解设2y^2+2

(7x^2+2y^2)^2-(2X^2+7Y^2)^2因式分解
(7x^2+2y^2)^2-(2X^2+7Y^2)^2因式分解

(7x^2+2y^2)^2-(2X^2+7Y^2)^2因式分解
设2y^2+2x^2为m
(m+5x^2)^2-(m+5y^2)^2
(2m+5x^2+5y^2)(5x^2-5y^2)
把原式代入
5*9(x^2+y^2)(x-y)(x+y)
45(x^2+y^2)(x+y)(x-y)
注：平方差公式a^2-b^2=(a+b)(a-b)

(7x^2+2y^2)^2-(2X^2+7Y^2)^2
=（7x²+2y²+2x²+7y²）（7x²+2y²-2x²-7y²）
=（9x²+9y²）(5x²-5y²)
=45(x²+y²)(x+y)(x-y)

因式分解x(x+y)(x-y)-x(x+y)^2 x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 化简y(x+y)+(x+y)(x-y)-x^2 (x+y)(x-y)-(x-y)^2如题 (x+y)(x-y)-(x-y)^2 【2(x-y)(x-y)(x-y)-8(x-y)(x-y)(x+y)+6y(x-y)(x-y)]/2(x-y)(x-y) 化简3(x-y)-7(x--y)+2(y-x) x^2(x-y)+(y-x) x(x-y)2-(y-x)3 [2/3x-2/x+y(x+y/3x-x-y)]/x-y/x 化简：{2/3x-2/(x+y)[(x+y)/3x-x-y]}/(x+y)/x 计算2/3x-2/x+y(x+y/3x-x-y)/x-y/x 化简3x-2/(x+y)[(x+y)/3x-x-y]÷(x-y)/x 【(x-y)^2+(x+y)(x-y)】除以 2x [(x-y)²+(x+y)(x-y)]除以2x 计算:y-x分之x+y+x-y分之y-y-x分之2x-y [(x-y)^2-(x+2y)(x-2y)]/y 计算[2x^2-(x+y)(x-y)][(-x-y)(y-x)+2y^2] (x+y)^2(x-y)^2-(x-y)(x+y)(x^2+y^2)分解因式