Question

Help!!!!!!!!!!!!!!!!!! Look at the picture.

Answer 1

`f(a^(2))=7(a^(4))-8`

Explanation:

we have

`f(x)=7x^(2)-8`

we know that

`f(a^(2))`

Is the value of f(x) for
`x=a^(2)`

so

substitute the value of x in the function

`f(a^(2))=7(a^(2))^(2)-8`

`f(a^(2))=7(a^(4))-8`