Question

If f(x) = 2x² + 1, what is f(x) when x = 3?
1
7
13
19​

Answer 1

19

Explanation:

Given:

f(x) = 2x² + 1

x =3

Solve:

f(x) = 2x² + 1

f(x) = 2(3)² + 1

f(x) = 2(3)² + 1

f(x) = 18 + 1

f(x) = 19

As a result, if (x) = 2x² + 1 then when x is 3, f(x) = 19.

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