how do i solve x squared-5x=14

I dont understand how to this problem,ive tried squareing x but nothing has worked
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1 Answer

x² - 5x = 14
x² - 5x - 14 = 0 {subtracted 14 from both sides}
(x - 7)(x + 2) = 0 {factored into two binomials}
x - 7 = 0 or x + 2 = 0 {set each factor equal to 0}
x = 7 or x = -2 {solved each equation for x}
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