Question

If f(x)= 2x^2+1, what is f(x) when x=3

Answer 1

The answer is:

f(3) = 19

Explanation:

Plug in the value of x, i.e., 3:

`\sf{f(x)=2x^2+1}`

`\sf{f(3)=2(3)^2+1}`

Simplify step by step

`\sf{f(3)=2*9+1}`

`\sf{f(3)=18+1}`

`\sf{f(3)=19}`

Answer 2

19

Explanation:

f(3) = 2(3)^2 + 1

= 2(9) + 1

= 18 + 1

= 19