The owner of a video store has determined that the profits "P" of the store are approximately given by P(x)=-x^(2)+90x+52, where x is the number of videos rented daily. Find the number of videos that must be rented to get the maximum daily profit, then find the maximum daily profit to the nearest dollar.

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.