分解因式(x+2y²)-9(x-y)²

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分解因式(x+2y²)-9(x-y)²
分解因式(x+2y²)-9(x-y)²

分解因式(x+2y²)-9(x-y)²
(x+2y²)-9(x-y)²
=(x+2y+3x-3y)(x+2y-3x+3y)
=(4x-y)(5y-2x)

(x+2y²)-9(x-y)²
=(x+2y)²-(3x-3y)²
=(x+2y+3x-3y)(x+2y-3x+3y)
=(4x-y)(-2x+5y)