Question

como fazer 2x-3y=1 x.y=2

Answer 1

■ 2x-3y=1
■ x.y=2

x = 2/y

2(2/y) - 3y = 1

4/y -3y = 1

4/y - 3y²/y = y/y

4 - 3y² = y 

-3y² - y + 4 = 0 

▲ = 49

■ y1 = -4/3  
■ y2 = 1

x1 = 2/y ⇔ x1 = 2/(-4/3) = 2*3/-4 = -6/4 = -3/2
x2 = 2/y ⇔ x2 = 2 

S={(-3/2,-4/3) ; (2,1)}

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06/10/2016
Sepauto 
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