(2x+y)²+(x+3y)(x-3y)-x(5x+8y)因式分解
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(2x+y)²+(x+3y)(x-3y)-x(5x+8y)因式分解(2x+y)²+(x+3y)(x-3y)-x(5x+8y)因式分解(2x+y)²+(x+3y)(x-3y
(2x+y)²+(x+3y)(x-3y)-x(5x+8y)因式分解
(2x+y)²+(x+3y)(x-3y)-x(5x+8y)因式分解
(2x+y)²+(x+3y)(x-3y)-x(5x+8y)因式分解
(2x+y)²+(x+3y)(x-3y)-x(5x+8y)
=4x²+4xy+y²+x²-9y²-5x²-8xy
=-4xy-8y²
=-4（x+2y）²