(-x-y)·(x-y),(x-2)(x²+4)(x+2),(a+2b)(a-2b)-(a+2b)²2012²用平方差公式,a²+b²,ab

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(-x-y)·(x-y),(x-2)(x²+4)(x+2),(a+2b)(a-2b)-(a+2b)²2012²用平方差公式,a²+b²,ab(-x-y

(-x-y)·(x-y),(x-2)(x²+4)(x+2),(a+2b)(a-2b)-(a+2b)²2012²用平方差公式,a²+b²,ab
(-x-y)·(x-y),(x-2)(x²+4)(x+2),(a+2b)(a-2b)-(a+2b)²
2012²用平方差公式,a²+b²,ab

(-x-y)·(x-y),(x-2)(x²+4)(x+2),(a+2b)(a-2b)-(a+2b)²2012²用平方差公式,a²+b²,ab
(-x-y)·(x-y)=Y^2-X^2,
(x-2)(x²+4)(x+2)=(X^2-4)(X^2+4)=X^4-16
(a+2b)(a-2b)-(a+2b)²
=a^2-4b^2-(a^2+4ab+4b^2)
=-4ab
2012^2=(2000+12)^2=4000000+48000+144=448144.

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 {(x,y) |x|+|y| x>y?x:y 【2(x-y)(x-y)(x-y)-8(x-y)(x-y)(x+y)+6y(x-y)(x-y)]/2(x-y)(x-y) 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 计算2x/1-x+y/1·（2x/x+y-x-y） [(x-y)^2-(x+2y)(x-2y)]/y