Question

32пункта!!!! СРОЧНО.СПАСИБО

Answer 1

$left { {{x-y+ sqrt{xy}=20 } atop {xy=64}} right. \ left { {{x-y+ sqrt{xy}=20 } atop {sqrt{xy}=8}} right. \ left { {{x-y+8=20} atop {xy=64}} right. \ left { {{x=y+12} atop {xy=64}} right. \ y(y+12)=64\ y^2=12y-64=0\ D=144+256=400\ y1=4 y2=-16\ left { {{y1=4} atop {x1=16}} right. left { {{y2=-16} atop {x2=-4}} right.$