Question

Add or subtract.

7z^2 − 2z^4 − 2z^2 − 5z^4
a.−2z^6
b.9z^2 + 3z^4
c.5z^2 − 7z^4
d.5z^4 − 7z^8

Answer 1

First, we need to combine the like terms in the expression:

7z^2 − 2z^4 − 2z^2 − 5z^4 = (7z^2 - 2z^2) + (-2z^4 - 5z^4) = 5z^2 - 7z^4

So the answer is (c) 5z^2 − 7z^4