Completing the Square.

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Presentation transcript:

Completing the Square

What is completing the square used for? Completing the square is used for all those not factorable problems!! It is used to solve these equations for the variable.

Rule for Completing the Square It factors into this!

Example: Find the value of c, then write the expression as the square of a binomial. x2-3x+c

Example: Solve by completing the square. x2+6x-8=0 Don’t forget: Whatever you add to one side of an equation, you MUST add to the other side!

More Examples! 5x2-10x+30=0 x2-2x-6=0 x2-2x=6 x2-2x+__=6+__

Assignment