# How do you factor #k^2 + 8k = 84#?

##### 2 Answers

#### Explanation:

One way to approach this problem is by "completing the square"

Factor: y = k^2 + 8k - 84

Ans: (k - 6)(k + 14)

#### Explanation:

I use the new AC Method. a and c have opposite signs.

Factor pairs of (-84) --> (-2, 42)(-3, 28)(-6, 14). This sum is 8 = b.

y = (k - 6)(k + 14)