Question

Which is f(5) for the function -2x2 + 2x - 3?

Answer 1

f(5) = - 43

Explanation:

`f(x) = - 2 {x}^(2) + 2x - 3 \\ plugging \: x = 5 \\ f(5) = - 2( {5})^(2) + 2 * 5 - 3 \\ \hspace{20 pt} = - 2 * 25 + 10 - 3 \\ \hspace{20 pt}= - 50 + 7 \\ f(5) = - 43`

Answer 2

-43

Explanation:

-2x2 + 2x - 3?

Let x = 5

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

-2 (25) +10 -3

-50 +10 -3

-43