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

User ECallpani
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2 Answers

5 votes
2(3)^2 +1
2 (3*3)+1
2(9)+1
18+1
19.
User Tim Cools
by
7.1k points
4 votes

The answer is 19

Just replace x = 3

f(3) = 2x2 + 1

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

f(3) = 2(9) + 1

f(3) = 18 + 1

f(3) = 19

User Fishsticks
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