[tex] x^{2} -4x+35=-9 x^{2} +11x+45[/tex]

x^2+9x^2-4x-11x-45+35=010x^2-15x-10=0д=15^2-4*10*(-10)=225+400=625=25^2x1= (15+25)/20=35/20=7/4x2= (15-25)/20 = -10/20=-1/2