凯文马丁投篮姿势gif:555,帮忙解两个初二的分解因式题。

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4ax^2-6axy-10xy^2+15y^3
(x+y)(x+y+2xy)+(xy+1)(xy-1)
清解答详细点

(x+y)(x+y+2xy)+(xy+1)(xy-1)
=(x+y)^2+2xy(x+y)+(xy+1)(xy-1)
=(x+y+xy+1)(x+y+xy-1)
=(x+1)(y+1)(x+y+xy-1)

分组分解第一题:
4ax^2-6axy-10xy^2+15y^3
=2ax(2x-3y)-5y^2(2x-3y)
=(2ax-5y^2)(2x-3y)