There are four ways to solve a quadratic equation.

$d)\:&space;\:&space;\left&space;(&space;2x-1&space;\right&space;)^{2}=18$

$2x-1=\pm&space;\sqrt{18}$

$2x=1\pm&space;3\sqrt{2}$

$x=\frac{1+3\sqrt{2}}{2}\:&space;\:&space;or\:&space;\:&space;x=\frac{1-3\sqrt{2}}{2}$

When solving Quadratic Equations, unless the directions tell you which method to use, you can use whatever method you like.  If you can factor the trinomial, that is often the easiest method to use.  If it is difficult to tell what the factors are or if there are large coefficients, often using the quadratic formula is the best method to use.  It is always wise to practice all four methods as much as possible.  The more you do the better your skill becomes.  Remember Practice Makes Perfect.  The goal is always to become successful in math!

Filed under: Pre-requisites for Pre-Calculus

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