How do you solve #x^2+18x=10# by completing the square?
For completing the square, you take half the coefficient of the x value, square it, and add it. So in this case, 81 I suppose?
I apologize, I don't quite remember how to do this. However there is already a 10...
Oh! I got it!
So add 91 and then you would get:
Then you factor:
Solve by subtracting 9:
And that should be your answer.
To complete the square a must be 1 (which it is) and:
notice we have to add c to both sides of the equation so we don't alter the value.
now factor the left side:
now we solve: