Question

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

x²– 15x – 23 = 0, which number would have to be added to "complete the
square?
​

Answer 1

225/4

Explanation:

x²– 15x – 23 = 0

To complete the square

We take to coefficient of the x term

-15

divide by 2

-15/2

Square it

225/4

Add it to each term