Question

When solving x^2 - 20x = 5 by completing the square what value is added to both sides of the equation?

Answer 1

You must add (b / 2)^2.

(-20/2)^2
-10^2
100

Answer 2

Always in a quadratic equation \(ax^2 + bx + c\), you must add \( (b \div 2)^2\) to both sides for completing the square.

Answer 3

okay, got it.. thank you!! :)

Answer 4

:P