Question

LCM x^2+9x, x^2-9x
whats the LCM???

Answer 1

First factor each.
Can you factor x^2+9x ?
Can you factor x^2-9x ?

Answer 2

no
so would it be zero

Answer 3

oh okay i got it now thanks

Answer 4

Im still stuck would it be x^2(9-9)

Answer 5

x^2+9x = x(x + 9)

x^2-9x = x(x - 9)

So each expression has 2 factors. Do they share any "common factors"?

Answer 6

just x

Answer 7

yikes. nevermind! that's the HCF.
The LCM is x(x + 9)(x - 9)

Answer 8

thank you alot

Answer 9

sure. no problem.