解公因式:(x+y)-6x+6y+9(x+y)?

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解公因式:(x+y)-6x+6y+9(x+y)?解公因式:(x+y)-6x+6y+9(x+y)?解公因式:(x+y)-6x+6y+9(x+y)?=4x+16y=4(x+4y)全部展开收起发照片给你原式

解公因式:(x+y)-6x+6y+9(x+y)?
解公因式:(x+y)-6x+6y+9(x+y)?

解公因式:(x+y)-6x+6y+9(x+y)?

=4x+16y=4(x+4y)

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原式=x+2xy+y-6x+6y+9x+18xy+9y
=4x+20xy+16y
=4(x+y)(x+4y)

原式=10(x+y)-6(x-y)
=10(x+y)(x+y)-6(x+y)(x-y)
=2(x+y)[5(x+y)-3(x-y)]
=2(x+y)(2x+8y)
=4(x+y)(x+4y)