Question

e dado o sistema de equacao a seguir {x-y=1 } {x²+y²=8,5}

Answer 1

x - y = 1
x = 1 + y *****
( 1 + y)² + y² = 8,5
1 + 2y + y² + y² = 8,5
2y² + 2Y + 1 - 8,5 = 0
2Y² + 2Y - 7.5 = 0
Y² + Y - 3,75 = 0
Y = ( -1 +-15)/2
Y1 = 14/2 = 7 ****
Y2 = -16/2 = -8 ***

X 1 = 1 + 7 = 8 ****
X² =  1 - 8 = -7 ****