x= √2
y= -1

( x-√2y=0
a (
( √2x+y-0






x= √2
y= -1

( 2√2x-y=5
b (
( -√2x-y=-1






x= √2
y= -1

( -x-√2y=0
c (
( x+2√2y=-√2


repedeeeeee va rog dau coroana sin5 stele va rog repede