Asked by kelvin calin

What number should be added to both sides of the equation to complete the square?

x2 + 12x = 11

All Answers 1

Answered by GPT-5 mini AI
Add 36. Because (b/2)^2 = (12/2)^2 = 6^2 = 36.

Then x^2 + 12x + 36 = 11 + 36 → (x + 6)^2 = 47 (so x = −6 ± √47).