Question

If f(x) = 2x2 + 1. what is f(x) when x = 3?
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Answer 1

The answer is 19 because it is

Answer 2

`\huge {\boxed {\tt{Solution :}}}`

Given :

• 
  `\sf {f(x) = 2x^2 + 1.\:What\: is\:f(x)\:when \:x=3}`.

To Find :

• 
  `\sf {f(x)}`

Putting value we get :

`\sf{ : \implies{f(x) = 2x^2 + 1 }} \\ \\ \sf{ : \implies{f(3) = 2 * (3)^2 + 1 }} \\ \\ \sf{ : \implies{f(3) = 2 * 9+1 }} \\ \\ \sf{ : \implies{f(3) =1 8 +1 }} \\ \\ :\implies{\boxed{\tt{f(3) =19}}}`

`\bf {\therefore{f(3) =19}}`

`\rule {307}{2}`