Given q(r) = r^2 − 4, evaluate. q(−2)

Question

Given q(r) = r^2 − 4, evaluate.

q(−2)

Answer 1

Given q(r) = r^2 − 4, evaluate.

q(−2) This notation is equivalent to q(r=-2)

Substitute -2 in for r

q(-2)=(-2)^2-4=4-4=0

q(-2)=0