Open Question: how to find two numbers whose sum is 55 and whose product is 684?
20:38 Publicado por Nadim
x + y = 55
y = 55 - x
y = 55 - x
xy = 684
x(55 - x) = 684
55x - x^2 = 684
0 = x^2 - 55x + 684
(55 ± v289) / 2
x = (55 ± 17) / 2
x = {19, 36}
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