Question

sendo (x y, 35) = (12,xy), dertemine o valor de x e de y

Answer 1

Ola Mba 

sendo (x + y, 35) = (12, xy)

x + y = 12
x*y = 35

y = 12 - x
x*(12 - x) = 35

x² - 12x + 35 = 0

delta

d² = 144 - 140 = 4

d = 2

x = (12 + 2)/2 = 14/2 = 7
y = 12 - x = 12 - 7 = 5

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