Determine the value for b that will make the following quadratic expression factorable: x2+ bx −12

Question

b = -13


b)
b = -8


c)
b = -7


d)
b = -4

Answer 1

x² +bx-12

 

Possible factors for -12 are 1 &- 12, 2 &- 6, 3 &- 4

b= -4 is possible.

 

x² -4x -12

=(x-6)(x+2)