Question

find the sum
-18z^2+(-12z^2)+z^2

Answer 1

since we have like terms, let's look at the coefficients

-18 + (-12) + 1 = __?

Answer 2

-29

Answer 3

right, so

-18z^2+(-12z^2)+z^2 = ?

Answer 4

-29z^2 ?

Answer 5

yup! good job

Answer 6

remember, we can do this because all the terms are z^2