Question

Find f(-2) if
f(x)=x^4+2x^2-1

Answer 1

23

Answer 2

thought it would be 13 but got 23 when I plugged it in to my calculator...

Answer 3

did u plug it in as well?

Answer 4

16 + 2 * 4 -1

16 + 8 - 1

= 23

Answer 5

Nope, I don't use calculators. =P
It's easier solving on the paper or in your mind.

Answer 6

weird, yea.... I used the method they taught us and I was like huh because I got 13

Answer 7

ty