Question

resolva o sistema de equaçao do 2 grau x-y=5 e x^+y^=13

Answer 1

Oi Nat

x - y = 5
x² + y² = 13

y = x - 5
y² = x² - 10x + 25 

x² + x² - 10x + 25 = 13

2x² - 10x + 12 = 0

x² - 5x + 6 = 0

(x - 3)*(x - 2) = 0

x1 = 3,  y1 = x1 - 5 = 3 - 5 = -2
x2 = 2, y2 = x2 - 5 = 2 - 5 = -3

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