X^2+4x=15 complete the square

Step-by-step explanation:

x^2 + 4x = 15 ... take half of ur x term, then square it, then add to both sides

x^2 + 4x + 4 = 15 + 4

(x + 2) ^2 = 19

sqrt (x + 2) ^2 = sqrt 19

x + 2 = sqrt 19

x = - 2 ( + - ) sqrt 19

so x = - 2 + sqrt 19 or x = - 2 - sqrt 19