Question

Find the following showing the steps
(x) = 7 - 5x + 7x^2, find f(-9a)

Answer 1

7 + 45a + 567a²

Explanation:

to evaluate f(- 9a) substitute x = - 9a into f(x)

f(- 9a) = 7 - 5(- 9a) + 7(- 9a)²

= 7 + 45a + 7(81a²) = 7 + 45a + 567a²