Question

sistema: {x²+3xy=0 {x - y= 2

Answer 1

1) x-y=2
x=2+y

2)(2+y)²+3(2+y)y=0
4+4y+y²+6y+3y²=0
4y²+10y+4=0

$\frac{-10+- \sqrt{100-64} }{8} = \frac{-10+-6}{8}$
y1= (-10-6)/8=-2
y2=(-10+6)/8= -1/2


x1=4
x2= 3/2