Worth 20 points and ! some steps to rewrite the expression x3 − 9x + x2 − 9 as a product of three factors are shown below: step 1: x3 − 9x + x2 − 9 step 2: x3 + x2 − 9x − 9 step 3: x2(x + 1) − 9(x + 1) which of the following best shows the next two steps to rewrite the expression? step 4: (x2 + 9)(x + 1); step 5: (x + 3)(x + 3)(x + 1) step 4: (x2 − 9)(x + 1); step 5: (x + 3)(x + 3)(x + 1) step 4: (x2 + 9)(x + 1); step 5: (x − 3)(x + 3)(x + 1) step 4: (x2 − 9)(x + 1); step 5: (x − 3)(x + 3)(x + 1)