分解因式;(2x+y)^2-9(x+2y)^2=

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分解因式;(2x+y)^2-9(x+2y)^2=分解因式;(2x+y)^2-9(x+2y)^2=分解因式;(2x+y)^2-9(x+2y)^2=(2x+y)^2-9(x+2y)^2=[(2x+y)+3

分解因式;(2x+y)^2-9(x+2y)^2=
分解因式;(2x+y)^2-9(x+2y)^2=

分解因式;(2x+y)^2-9(x+2y)^2=

(2x+y)^2-9(x+2y)^2
=[(2x+y)+3(x+2y)][(2x+y)-3(x+2y)]
=(5x+7y)(-x-5y)
=-(5x+7y)(x+5y)