Answer
a. 8, b. 74
Work Step by Step
We are given the function $f(x)=5x^{4}-3x^{2}+6$. In order to find the specified values, we can plug the values into the function and solve.
a. $f(-1)= 5(-1)^{4}-3(-1)^{2}+6=(5\times1)-(3\times1)+6=(5)-(3)+6=5-3+6=8$
b. $f(2)= 5(2)^{4}-3(2)^{2}+6=(5\times16)-(3\times4)+6=(80)-(12)+6=80-12+6=74$