Determine Net Change

Question

f(z) = 3 − 5z²;    z = −2, z = 0

Answer 1

To find net change, we need to evaluate f(z) at the two given values of z, then find the difference between the function values at those given z values. f(-2) = 3 - 5(-2)² or -17 and f(0) = 3. Subtracting in the order of f(0) - f(-2), we have a net change of 3 - ( -17) or 20.