D=2^2-4 х 3 х (-5)=64x1=-2+8/2*3=6/6=1x2=-2-8/6=-10/6=-5/3=-1(2/3)
2хР/4у=х^2у - у^2х
2xP=4y(х^2у - у^2х)
P= 4y(х^2у - у^2х)/2x
P= 2y(х^2у - у^2х)/x
P= 2yx(ху - у^2)/x
p=2y(xy-y^2)