Question

what number musst you add to the polynomial below to complete the square?
x^2-23x

Answer 1

take half of 23 and square it

Answer 2

then it is 132.25 but that isn't the answer is it?

Answer 3

i believe it is
\[(x-11.5)^{2} = x^{2}-23x +132.25\]

Answer 4

okay thank-you for the help!

Answer 5

yep, just remember to take half of x coefficient and square it
then add that to both sides :)