Question

Please help ASAP

If f(x)=x^3+x-7 and g(x)=-5x, find (fog)(x) and (gof)(x)


(fog)(x)=?

Answer 1

I hope this helps you


x= -5x


f (g (x))=f (-5x)=(-5x)^3+(-5x)-7



f (-5x)= -125x^3-5x-7


x=x^3+x-7


g (f (x))=g (x^3+x-7)= -5 (x^3+x-7)


g (x^3+x-7)= -5x^3-5x+35