Ответ:
х²+2х-15≠0
D=4+60=> √D=8
(-2±8)/2= -5 ; 3
x≠-5;3
(x×(x-2)-3(x-2))/(x×(x+5)-3×(x+5))≥0
(x-2)(x-3)/(x+5)(x-3)≥0
(x-2)/(x+5)≥0
{x≥2; x>-5
{x≤2; x<5
x≥2
x<-5
x≠3
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Ответ:
х²+2х-15≠0
D=4+60=> √D=8
(-2±8)/2= -5 ; 3
x≠-5;3
(x×(x-2)-3(x-2))/(x×(x+5)-3×(x+5))≥0
(x-2)(x-3)/(x+5)(x-3)≥0
(x-2)/(x+5)≥0
{x≥2; x>-5
{x≤2; x<5
x≥2
x<-5
x≠3