计算(3x-2y)²(3x+2y)²(9x+4y)²要过程
计算(3x-2y)²(3x+2y)²(9x+4y)²要过程
(2x-3y)(2x+3y)(4x²+9y²)求过程
计算(要过程):Y+ (—2Y+2)—(3Y+3) 7X—(6X—5Y)—2Y 3X²—【7X—(6X—8)—
(x-y)² - (-y-2x)(y-2x) 要过程
(x-y)/(2x+2y)与(xy)/(x+y)²通分要过程
计算(3x-3y)²(x-y)³(y-x)²(y-x)³要过程,
计算:(x+2y)(3x-5y)-(6x的四次方y²-2x²y²)÷(2x²y&
(3x-y)²-2x(4x-5y)-(x+2y)²
先化简再求值:(x-2y)²-(x+2y)(x-2y)-(x-3y)(x-y).其中x²+9y
计算4(x+y)^5(x-y)^4÷[2(x+y)³*(y-x)²]
计算:(3x-4y)-[-(2y+x)+(x-3y)]-6x
计算:3x+2y/4=2x+y/5=x-y+1/6.(要求有过程)