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(2x+3y)(x-4y)、(5x-y)(-x-3y)、(3-x)(4+y)谁告诉我这类题怎么做呀?
(y-x)(x-y)^3(y-x)^5怎么算
-5(5x+y)-3(2x-3y)怎么做?
(2x-3y)-(5x-y)怎么算
(2x-3y)2-(4y-3x)(3x+4y)怎么做?
[(3x+y)²-(3x-y)²]÷(4x-2y)计算 怎么做?
数学(x-y)^5*(y-x)^3*(x-y)^2
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
(2X-3y)-(5x-y)
x=4-5y,3x-9y=4用代入法怎么做
x^4-2x^2y-3y^2+6y-4因式分解怎么做
y=3x平方+2x怎么做啊