(1/2*х-3у²)²=(1/2*х)²-2*1/2*3*ху²+(3у)²=1/4*х² -3 ху²+9у^4
a=-3
1/x-6+(4/x+6)=3/x-4
1/x-6+4/x+6-3/x+4=0
2/x=-4
x=-1/2 или x=-0.5
см.рис.
x^2 = 3*(1/3) = 1
Т.к. q<0, то x=-1