Question

Which of the following is a factor of x^2 – 8x – 48?

x – 8

x + 4

x – 6

None of the above

Answer 1

x^2 – 8x – 48
= x^2 -12x + 4x - 48
= x(x - 12) + 4(x - 12)
= (x + 4)(x - 12)
therefore x+4 is a factor of x^2 – 8x – 48