Question

2
3
The equation x2-1x-90=0 has solutions (a, b). What is a + b?

Answer 1

Answer+Explanation:

We have:

x2 - 1x - 90 = 0

⇒ 2x - 1x - 90 = 0

Because of:

2x - 1x

= (2 - 1)x

= 1x

⇒ 1x - 90 = 0

1x = 0 + 90 = 90

⇒ a + b = 1