Question

Which of the following is a factor of x2 + 19x + 84?

x + 6

x + 7

x + 2

None of the above

Answer 1

x^2 + 19x + 84
= x^2 + 7x + 12x + 84
= x(x+7) + 12(x+7)
= ...?!

Answer 2

You may use the factor theorem too here.
Check which of the following results in 0.
1) x = -6
2) x = -7
3) x = -2
4) None

Answer 3

x=7 ?

Answer 4

Don't get confused by my answer. Check out @Callisto 's

Answer 5

i dont understand