3p squared + 6p + 18 divided by p - 6

Sherina wrote and solved the equation. x-56=230 x-56-56=230-56 x=174 what was sherina’s error? sherina’s work is correct. sherina only needed to subtract 56 from 230. sherina made a subtraction error when subtracting 56 from 230. sherina should have added 56 to both sides of the equation.

Plzzz answer both questions and i will give you 100 points

For a function f(x), a) if f(7) = 22 then f^-1(22) = b) f^-1(f(c)) =