If this is just factoring, x^2 + x - 90 turns into this:
(x - 9)(x + 10)
If your trying to solve for x, we take the factored expression and set it equal to 0.
(x - 9)(x + 10) = 0
Set each binomial into two equations.
x - 9 = 0 and x + 10 = 0
Solve for x and we get two answers.
x = 9
x = -10
Hope this helps you out more. If you need more explaining just comment on my answer and i help you out even more deeper into the question.
Answer:
A) $209,619
Step-by-step explanation:
y = 1.55x + 110,419
y = 1.55(64,000) + 110,419
y = 99,200 + 110,419
y = 209,619
1+8 It can help because 4+5 equals 9. So 1+8 will help because it equals 9 too.