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

Explanation:

x2+15x-23=0

17x-23=0

so a=0 , b=17 & c= -23

and complete it on the calculator

first click 9 ,3 ,=&=

and click mode 5,3