8*(10-3*x)^2-5*(10-3*x)-3=0
8*(100-30*x-30*x+9*x^2)-50+15*x-3=0
800-240*x-240*x+72*x^2-50+15*x-3=0
72*x^2-465*x+747
D=465^2-(4*72*747)=1089
1089^0.5=33
x=(465-33)/(2*72)=3
8*(100-30*x-30*x+9*x^2)-50+15*x-3=0
800-240*x-240*x+72*x^2-50+15*x-3=0
72*x^2-465*x+747
D=465^2-(4*72*747)=1089
1089^0.5=33
x=(465-33)/(2*72)=3