Ответ:
x1=7, x2= -2, x3= -1+√15, x4= -1-√15
Объяснение:
ОДЗ: x≠0, x≠-√14, x≠√14
Пусть (x²-14)/x= t, тогда:
t- 10/t=3 t≠0
(t²-3t-10)/t=0
D= 9+40= 49
t1= (3+7)/2= 5
t2= (3-7)/2= -2
1) (x²-14)/x= 5
(x²-5x-14)/x=0
D= 25+56=81
x1= (5+9)/2= 7
x2= (5-9)/2= -2
2) (x²-14)/x= -2
(x²+2x-14)/x=0
D= 4+56= 60
x3= (-2+√60)/2= -1+√15
x4= (-2-√60)/2= -1-√15
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Verified answer
Ответ:
x1=7, x2= -2, x3= -1+√15, x4= -1-√15
Объяснение:
ОДЗ: x≠0, x≠-√14, x≠√14
Пусть (x²-14)/x= t, тогда:
t- 10/t=3 t≠0
(t²-3t-10)/t=0
D= 9+40= 49
t1= (3+7)/2= 5
t2= (3-7)/2= -2
1) (x²-14)/x= 5
(x²-5x-14)/x=0
D= 25+56=81
x1= (5+9)/2= 7
x2= (5-9)/2= -2
2) (x²-14)/x= -2
(x²+2x-14)/x=0
D= 4+56= 60
x3= (-2+√60)/2= -1+√15
x4= (-2-√60)/2= -1-√15