Question

Solve by completing the square.

x^2 -20x=10

Answer 1

\[x^2 -20x=10\]

Answer 2

100

Answer 3

x^2 -20x +100 = 10 + 100

divide -20 by two and square it.. you add that (100) to both sides.

Answer 4

knew it had something to do with 100!

Answer 5

what do I do after that

Answer 6

(x-10)^2 = 110
\[x-10=\sqrt{110}\]

and we get two possible answers for x
x=10 + sqrt 110 or x = 10- sqrt 110

Answer 7

just wanted to say you did an awesome job explaining this. I was able to do the next 10 probs by myself, pretty easily. Thank you :)