Find formulas for f◦g and g◦f, and state the domains of the compositions

f(x)=x2, g(x)=√1-x

Help pls I couldn’t find the answer

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!