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Find the LCM for

u^3 + 6u^2 + 9u, u^2 - 6u

I came up with

u(u+3)(u-6) is this correct?

1 answer

The factors of the first term are
u(u^2 + 6u + 9) = u(u+3)^2
and of the second term are
u(u-6)

The LCM is u*(u+3)^2*(u-6)

u+3 must appear twice.
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