f(-3) = 2*(-3)^2 - (-3)

Question

0

553

1

Guest Jul 22, 2014

+33654

+5

Best Answer

I assume you have a function f(x) = 2x² - x and you want to find it's value when x = -3. You could just do this in the calculator here.

(-3)² = 9 and -(-3) = +3, so f(-3) = 2*9 + 3 = 21

Alan Jul 22, 2014

Alan · Answer 1 · 2014-07-22T07:28:26

I assume you have a function f(x) = 2x² - x and you want to find it's value when x = -3. You could just do this in the calculator here.

(-3)² = 9 and -(-3) = +3, so f(-3) = 2*9 + 3 = 21