作业帮25(x2+ 2xy +y2)-9(x2-2xy+y2)因式分解.x2,y2是x平方,y平方的意思.2xy就是2xy.快,
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25(x2+ 2xy +y2)-9(x2-2xy+y2)因式分解.x2,y2是x平方,y平方的意思.2xy就是2xy.快,
25(x2+ 2xy +y2)-9(x2-2xy+y2)因式分解.x2,y2是x平方,y平方的意思.2xy就是2xy.快,
25(x2+ 2xy +y2)-9(x2-2xy+y2)因式分解.x2,y2是x平方,y平方的意思.2xy就是2xy.快,
25(x²+ 2xy +y²)-9(x²-2xy+y²)
=[5(x+y)]²-[3(x-y)]²
=[5(x+y)+3(x-y)][5(x+y)-3(x-y)]
=(8x+2y)(2x+8y)
=4(4x+y)(x+4y)
x2-2xy+y2-9
25(x2+ 2xy +y2)-9(x2-2xy+y2)因式分解.x2,y2是x平方,y平方的意思.2xy就是2xy.快,
因式分解:25x2-30xy+9y2
(x2+2xy+y2)( x2-xy+y2)2 化简
(x2-2xy+y2)-(x2+2xy+y2)=什么
( x2+xy+y2) ( x2+xy+2y2)-12y4
计算(x+y/x-y + 4xy/y2-x2)(x2-9y2)/（x2+2xy-3y2）
因式分解:25(x2+2xy+y2)-9(x2-2xy+y2)大神在哪里.速度解决++++分.
(3xy-9x2-2y2-6xy)-(6x2+2xy-3xy-y)
(x2+xy+y2)-4xy(x2+y2)
计算：(xy-x2)÷xy分之x2-2xy+y2
4x2-3y2+2xy-4x2+5x2
求证:(x2-xy+y2)3+(x2+xy+y2)3能被2x2+2y2整除
若X2+xy-2y2=0,则（x2+3xy+y2)/x2+y2=?
(x2+y2)(x2-xy+y2)-2x2y2因式分解
2(x2-xy)-3(2x2-3xy)-2[x2-(2x2-xy+y2)] 化简.
4x2-y2/x2-2xy+y2 +(2x-y)/2x2-2xy
x2+y2+2xy=256 x2+y2-2xy=4 (x2,