mukus13

Verified answer

X=y+2
y(y+2)=5,5
y²+2y-5,5=0
D=4+22=26
y1=(-2-√26)/2⇒x1=(-1-√26/2+2=(2-√26)/2
y2=(-2+√26)/2⇒x2=(2+√26)/2
x²+y²=(2-√26)²/4+(-2-√26)²/4=(4-4√26+26+4+4√26+26)/4=60/4=15
x²+y²=(-2+√26)²/4+(2+√26)/4=(4-4√26+26+4+4√26+26)/4=60/4=15