lim 4x^2+11x-3
x^2+2x-3
x->-3
rewaem v 4islitele 4x^2+11x-3
D=121+48=169=13^2
-11+13/8=1/4
-11-13/8=-3
togda v 4islitele budet
(x-0,25)(x+3)
2)rewaem v znamenatele
x^2+2x-3
D=4+12=16
-2+4/2=1
-2-4/2=-3
(x-1)(X+3)
togda polu4aetsya
(x-0,25)(x+3)/(x-1)(x+3) (x+3) sokrawaytsya okan4atel'no polu4aetsya
lim(x-0,25)/(x-2)
x->-3
podstavlyaem -3
(3-0,25)/(-3-2)=2.25/-5=-0,45 otvet