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Evaluate 2x squared -1 when x=3
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2 votes
Evaluate 2x squared -1 when x=3

User Adalyat Nazirov
by
3.4k points

1 Answer

4 votes

Hey there! :)

Answer:

17.

Explanation:

Given:

f(x) = 2x² - 1

Substitute in 3 for x:

f(3) = 2(3)² - 1

f(3) = 2(9) - 1

Simplify:

f(3) = 18 - 1

f(3) = 17.

User Tobias Sarnow
by
5.0k points
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