If 3 is a zero of g(x), then what must be a factor of the polynomial in g(x)?

Girardo is using the model below to solve the equation . girardo uses the following steps: step 1 add 4 negative x-tiles to both sides step 2 add 1 negative unit tile to both sides step 3 the solution is which step could be adjusted so that gerardo's final step results in a positive x-value? in step 1, he should have added 4 positive x-tiles to both sides. in step 1, he should have added 3 negative x-tiles to both sides. in step 2, he should have added 4 negative unit tiles to both sides. in step 2, he should have added 1 positive unit tile to both sides.

Use composition to determine if (x) or h(x) is the inverse of f(x) for the limited domain x2-1.

Plz hurry evaluate the expression a+b where a=8 and b=19