Question

Factor k2 + 13k + 12.

(k + 2)(k + 6)
(k + 3)(k + 4)
(k + 12)(k + 1)

Answer 1

Find two numbers that multiply to 12 and add to 13

Answer 2

Those two numbers are...?

Answer 3

1 and 12

Answer 4

good, so the factorization is (x+12)(x+1)

Answer 5

This trick only works when the leading coefficient is 1.

Answer 6

oh i get it