Question

What number should be added to both sides of the equation to complete the square?
x2 - 6x = 5

Answer 1

9 should be added

Explanation:

The number that should be added to complete the square is the square of half the x-coefficient: (-3)^2 = 9.

x^2 -6x +9 = 5 +9

(x -3)^2 = 14