Question

PLEASE HELP!!!
If f(x) = -2x^2 + x - 5, what is f(3)?

Answer 1

f(3) = 6

Explanation:

f(x)=2x^2 + x -5

f(3) = 2 (3)^2 + (3) - 5

f(3) = 8 + 3 - 5

f(3) = 11-5

f(3) = 6

Answer 2

• f(3) = -10

Explanation:

Given

• f(x) = -2x² + x - 5

Solving

• To find f(3), substitute x = 3 in the function
• ⇒ f(3) = -2(3)² + (3) + 5
• ⇒ f(3) = -2(9) + 8
• ⇒ f(3) = -18 + 8
• ⇒ f(3) = -10