First you factorise it. Then you cancel out the common terms.
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The Quadratic formula in mathematics is used to solve quadratic equations in algebra. The simplest way to solve these equations is to set each of the factors to zero and then solve each factor separately.
The roots of the quadratic equation are the x-intercepts of the curve.
By using the quadratic equation formula
How you solve an equation that doesn't factor is to plug a quadratic equation's format; ax2+bx+c into the quadratic formula which is x=-b+square root to (b2-4ac)/2a.
josh hutcherson