If you are good at math pls help me and use the screenshot below!

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

Factor the monomial completely 42a3b3

Which of the following values cannot be probabilities? 0.08, 5 divided by 3, startroot 2 endroot, negative 0.59, 1, 0, 1.44, 3 divided by 5 select all the values that cannot be probabilities. a. five thirds b. 1.44 c. 1 d. startroot 2 endroot e. three fifths f. 0.08 g. 0 h. negative 0.59