Question

Select one of the factors of x^2 + 3x - 54.

x + 27
x - 2
x - 6
x - 9

Answer 1

Since 6 * 9 = 54 and 9 - 6 = 3, your factors will involve 6 and 9...

One of them is positive and one is negative. So the answer is one of the last two.

Hint: The larger number will be positive so that you get a positive middle term.

Answer 2

(x+9)(x-6)

Answer 3

Very good :)