If f (x) = 3x2 - x, find f (-2).

10

14

38

'Ello.

Just plug in the values.

f (-2) = 3 (-2) ^2 - (-2) {Equation}

f (-2) = 3 (4) - (-2) {Multiply}

f (-2) = 12 - (-2) {The signs become a positive; add}

f (-2) = 14 {Answer}

You're welcome.

f (x) = 3x^2-x

F (-2)

replace x with - 2

3 (-2) ^2 - - 2 =

3*4 + 2 = 14

Answer is 14