Question

If f(x) = 2x+3 and g(x) = x^2 , then f[g(-3)]=?

Answer 1

`f(g(-3))=21`

Explanation:

`"evaluate g( -3) and substitute into f(x)"`

`g(color(red)(-3))=(color(red)(-3))^2=9`

`rArrf(g(-3))=f(9)=(2xx9)+3=21`