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

Answer 1

If the equation is f(x) = 2x²+1 and X=3

Then you you would plug 3 in for x and solve following the order of operation.

Exponent first, then Multiplication, and then Addition.

f(3) = 2(3)²+1 = would be (3)² = 2x9+1 = 18 + 1 = 19 therefore

f(3) = 19

Answer 2

For

f(x) = 2x² + 1

When x = 3

Just plug in 3 for x and do the indicated calculations.

Give it a try

Answer 3

I assume your equation is x²?

f(x) = 2x²+1 plugged in 3 for x

f(3) = 2(3)²+1 according to the order of operation, do the exponent first

f(3) = 2(9)+1 then multiplication

f(3) = 18+1 finally addition

f(3) = 19