Question

If using the method of completing the square to solve the quadratic equation

x²– 20x + 24 = 0, which number would have to be added to "complete the
square"?

Answer 1

x²-20x + 24 = 0

x²-20x = 24

x²-20x + 100 = 24 + 100

(x-10)² = 76

x = -2 √(19) + 10
x = 2 √(19) + 10