Question

Does someone mind helping me with this? Im having trouble with step 3 and 4. Thank you!

Answer 1

Explanation:

x^2 + 2x - 12 = 0

x^2 + 2x = 12

x^2 + 2x + (2/2)^2 = 12 + (2/2)^2

x^2 + 2x + 1 = 12 + 1

(x+1)^2 = 13

x+1 = +- sqrt (13)

x = -1 +- sqrt (13)