Question

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

Answer 1

Answer:

23

Step-by-step explanation:

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

Let x = -2

f(-2) = (-2)^4 +2(-2)^2 -1

       =16 +2*4-1

        =16+8-1

          24-1

            23