What number must you add to complete the square of x2 plus 14x equals -5?

Improved answer:

5

x2+14x+5 = 5-5

x2+14x+5 = 0

Solve by completing the square:

(x+7)2+5 = 0

(x+7)2+5-49 = 0

(x+7)2 = 44

x+7 = + or - the square root of 44

x = -7 + or - the square root of 44