分解因式:(1) (x+3y)^2-x-3y (2) ab(x-y)^2+b(y-x)^3
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(1) (x+3y)^2-x-3y
=(x+3y)^2-(x+3y)
=(x+3y)(x+3y-1)
(2) ab(x-y)^2+b(y-x)^3
=ab(y-x)^2+b(y-x)^3
=b(y-x)^2(a+y-x)
=(x+3y)^2-(x+3y)
=(x+3y)(x+3y-1)
(2) ab(x-y)^2+b(y-x)^3
=ab(y-x)^2+b(y-x)^3
=b(y-x)^2(a+y-x)
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(1)
(x+3y)^2-x-3y
=(x+3y0^2-(x+3y)
=(x+3y-1)(x+3y)
(2)
ab(x-y)^2+b(y-x)^3
=b(x-y)^2(a-x+y)
(x+3y)^2-x-3y
=(x+3y0^2-(x+3y)
=(x+3y-1)(x+3y)
(2)
ab(x-y)^2+b(y-x)^3
=b(x-y)^2(a-x+y)
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