How to solve the quadratic equation x² - 3x - 40 = 0

How do you solve the quadratic equation x² - 3x - 40 = 0 ?

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x² - 3x - 40 = 0
(x - 8)(x + 5) = 0 {factored into two binomials}
x - 8 = 0 or x + 5 = 0 {set each factor equal to zero}
x = 8 or x = -5 {solved each equation for x}

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