因式分解:-2y^2-6+2xy+3x-7y

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因式分解:-2y^2-6+2xy+3x-7y因式分解:-2y^2-6+2xy+3x-7y因式分解:-2y^2-6+2xy+3x-7yx^2+xy-2y^2-x+7y-6=(x^2-xy+2x)+(2x

因式分解:-2y^2-6+2xy+3x-7y
因式分解:-2y^2-6+2xy+3x-7y

因式分解:-2y^2-6+2xy+3x-7y
x^2+xy-2y^2-x+7y-6
=(x^2-xy+2x)+(2xy-2y^2+4y)-(3x-3y+6)
=x(x-y+2)+2y(x-y+2)-3(x-y+2)
=(x-y+2)(x+2y-3)