х^2-10=-3xх^2+3x-10=0Д=9 - 4*(-10)=49=7^2х1=(-3+7)/2=4/2=2x2=(-3-7)/2=-10/2=-5
(x(x-2)+3(x-3))/(x-2)(x-3)=3/(x-2)(x-3)