Question

find the LCM of t^2-81 and t^2+14t+45

Answer 1

expand.

(t-9)(t+9) and (t+9)(t+5)

Taking commons,

(t-9) (t+9) ( t+5)

Answer 2

huh i dont understand what you are say and how you work the problem

Answer 3

t^2-81 and t^2+14t+45


Factor them seperately.

(t^2 - 81) and t^2+14t+45
(t-9)(t+9) and (t+9)(t+5)

Answer 4

The least common multiple must have all of the factors from both terms, without duplicating.

Answer 5

Now look, (t+9) is common in both so we will take it once.

(t-9)(t+9)(t+5)

Answer 6

so the lcm would then be 9 and 5 right?

Answer 7

NO!
since it is a polynomial, so LCM =

(t-9)(t+9)(t+5)

Answer 8

getting it?