Question

как решить уравнение x(x-5)=24

Answer 1

x(x-5)=24
x^2 - 5x - 24 = 0
D = (-5)^2 - 4*1*(-24) = 25 + 96 = 121 = 11^2
x =  5 + 11 / 2 = 16/2 = 8
x =  5 - 11 / 2 = - 6/2 = - 3
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