Question

resolva o sistema x.y=13 x+y=-14

Answer 1

Ola Drika

x*y = 13
x + y = -14

y = 13/x 

x + 13/x + 14 = 0

x² + 14x + 13 = 0

delta
d² = 196 - 52 = 144
d = 12

x1 = (-14 + 12)/2 = -1 --> y1 = -13
x2 = (-14 - 12)/2 = -13 --> y2 = -1

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