Completing the Square Help!!

Hints on Homework:

#9:  5x^2 - 20x = 10  -- move the 10 to the left hand side of the equation and then factor out a five.

     5(x^2 - 4x - 2) = 0   Then complete the square using the terms inside of parentheses.  Just don't forget about the factor of five!!

5 [(x^2 - 4x + ___) - 2 - ___] = 0

5[(x^2 -4x + 4) -2 - 4] = 0

5[(x-2)^2  - 6] = 0  Therefore the factor inside the brackets must be equal to zero, since the only other factor is five.

(x-2)^2 =6 -- now use the square root rules from there.

#11: x^2 - 5x = 2  -- move the 2 to the left hand side of the equation.  Then use completing the square as show in class.

(x^2 - 5x + ____) - 2 - _____ =0

#13: x^2 - 12x +35 = 0

(x^2 -12x + ____) +35 - ____ = 0    Remember (b/2)^2!!

Hope the above tips help!

Feel free to check out this instructional video as well if you still have questions:
Completing the Square Instructional Video (easy problem)
Completing the Square Instructional Video #2 (harder problem)