Mammoth Memory

Complete the square – Getting rid of the square (easily)

(the first of three ways to solve (find the roots) of quadratics)

Get rid of x to complete the square

Completely get rid of the square


When it’s easy we complete the square as follows:



`x^2=9`                    Solve    `x=sqrt9`          `x=+-3`

`x^2=5`                    Solve    `x=sqrt5`

`(x-7)^2=3`        Solve    `x=7+-sqrt3`


See how we completely got rid of the square

Get any quadratic in the form
then we can find the values of `x`.

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