Question

f (x) = -x² + 6x - 18


Find f (-3)

Answer 1

Answer:

• -45

Step-by-step explanation:

Given

• f (x) = -x² + 6x - 18

To find f (-3) substitute x with -3

• f(-3) = -(-3)² + 6(-3) - 18 = - 9 - 18 - 18 = -45
• f(-3) = -45

Answer 2

Step-by-step explanation:

$f(x) = - {x}^{2} + 6x - 18 \\ f( - 3) = - {( - 3)}^{2} + 6( - 3) - 18 \\ = - 9 - 18 - 18 \\ = - 45$

-45 is the right answer.