3(x+y)²-7(x+y)+8(x+y)²+6(x+y) 要过程,否则不采纳!化简
化简 3(X-Y)²-4(X-Y)+7(X-Y)-6(X-Y)²
计算(要过程):Y+ (—2Y+2)—(3Y+3) 7X—(6X—5Y)—2Y 3X²—【7X—(6X—8)—
因式分解:(x-y)(3x-7y)²-4(x-y)(x+y)²
(3x-4y)(5x-4y)-(7x-8y)(6y-5x)
化简:(2x-y)²-4(x-y)(x+y)
(x-y)³+9(x-y)-6(x-y)²
x^8-x^7y+x^6y^2-x^5y^3+x^4y^4-x^3y^5+x^2y^-xy^7+y^8
化简下列各式,并求值:3(x-y)²-7(x-y)+8(x-y)²+6(x-y) 其中x=2,y
x[x+y][x-y]-x[x-y]² 因式分解是多少?过程 要步奏讲解.
(x+y)²+x+y-6因式分解
(3x+y)二次方-3(3x-y)(x+y)-(x-2y)(x+3y)要过程!
因式分解:x²(x-y)+(y-x)