Consider the following polynomial< br /> r(x) = 4x^4 - 16x^3 + 11x^2 + 4x - 3 < br /> < br /> step 2 of 3: use synthetic division to identify integer bounds of the real zeros. find the least upper bound and the greatest< br /> lower bound guaranteed by the upper and lower bounds of zeros theorem.

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.