Question

For f(x) = x3 – x2, which gives an output of 48?

O f(-8)
O fl-4)
O f(4)
O f(8)

Answer 1

f(4) gives an output of 48

Answer 2

f(4)

Explanation:

The output is the value of f(x) for a given value of x ( the input )

Substitute the given values of x into f(x) to determine the output, that is

f(- 8) = (- 8)³ - (- 8)² = - 512 - 64 = - 576 ≠ 48

f(- 4) = (- 4)³ - (- 4)² = - 64 - 16 = - 80 ≠ 48

f(4) = 4³ - 4² = 64 - 16 = 48

Thus f(4) gives an output of 48