数学计算(x²-y²)(x+y)÷(x+y)²
数学计算(x²-y²)(x+y)÷(x+y)²
计算 [12(x+y)³(y-x)]³÷[4(x+y)²(x-y)]²
数学用乘法公式计算(x+y+1)(x+y-1)(2x-y-3)²
[(x+y)(x-y)-(x-y)²]÷(-2y)数学高手来
利用公式计算(x²-y²)÷(x+y)
计算:(x+y)²-4(x+y)(x-y)+4(x-y)²
计算(x²/x+2y)-x+2y-2
计算(x²-y²)(x+y)÷(x+y)²等于
[(3x+y)²-(3x-y)²]÷(4x-2y)计算 怎么做?
计算4(x+y)^5(x-y)^4÷[2(x+y)³*(y-x)²]
计算:(xy-x²)×x-y/xy
(xy-x²)²÷(x-y)²/xy·x-y/x² 计算