Question

Find the LCM of z^2-49 and z^2+16z+63

Answer 1

Ok then, check it out:
The LCM is going to contain one copy of each DIFFERENT factor multiplied together
z^2-49= factor 1:(z-7) factor2:(z+7)
z^2+16x+63= factor 3:(z+9) factor 4:(z+7)
notice that factor 2 and 4 are the same, so we can ignore one copy, that leaves factors 1,2, and 3:
(z-7)(z+7)(z+9)
multiply it out to get your simplified answer.

Answer 2

Thank you I think I am starting to understand this now

Answer 3

good! =)