Question

For which value of b can the expression x2 + bx + 18 be factored?

A.
-19
B.
3
C.
7
D.
17

Answer 1

A) b = - 19

Explanation:

x² - 19x + 18 =

= x² - x - 18x + 18

= x(x - 1) - 18(x - 1)

= (x - 1)(x - 18)