2х^4 -15x ^3 + 14x^2 + 15х + 2 = 0
(x-2)(2x+1)(x^2-6x-1) x-2=0 x=2 2x+1=0 2x+=-1 x^2-6x-1=0 D=36-4*1*(-1)=40 x=-(1/2) x=2 x=3-корень 10 х=корень10 +3