(x+y)^2-9*y^2 因式分解,有过程就行...

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(x+y)^2-9*y^2因式分解,有过程就行...(x+y)^2-9*y^2因式分解,有过程就行...(x+y)^2-9*y^2因式分解,有过程就行...原式=(x+y)^2-(3y)^2=(x+y

(x+y)^2-9*y^2 因式分解,有过程就行...
(x+y)^2-9*y^2
因式分解,有过程就行...

(x+y)^2-9*y^2 因式分解,有过程就行...
原式=(x+y)^2-(3y)^2
=(x+y+3y)(x+y-3y)
=(x+4y)(x-2y)

(x+y)^2-9*y^2
=(x+y)^2-(3y)^2
=(x+y+3y)(x+y-3y)
=(x+4y)(x-2y)

(x+y)^2-9*y^2=(x+y-3y)(x+y+3y)=(x-2y)(x+4y)

(x+y)^2-9*y^2
=2*[(x+y)-9y]
=2*(x-8y)

=(x+y)^2-(3y)^2
=(x+y+3y)(x+y-3y)
=(x+4y)(x-2y)
OVER!