(x+R1) y (x+R2) son los factores.
- Desigualdad tipo "mayor que" (x+R1)(x+R2)>0
Si (x+R1)>0 y (x+R2)>0 ó
(x+R1)<0> - Desigualdad tipo "menor que" (x+R1)(x+R2)<0
Si (x+R1)<0>0 ó
(x+R1)>0 y (x+R2)<0
Ejercicios
- 2x²+5x3
x= [-5 √5² - 4(2)(-3) ] / 2(2)
x= (-5 √25+24) / 4
x=(-5√49) /4
x= (-5 7) /4
x1= 1/2
x2= -3
(2x-1)(x+3)>0
Caso 1
2x-1>0 | x+3>0
2x>1 | x>-3
x>1/2
CS (1/2,)
Caso 2
|
|
CS
CST (-,-3) (1/2,)
(x+5)(x-1)>0
Caso 1
x+5>0 | x-1>0
x>-5 | x>1
CS(1,)
Caso 2
x+5<0>,-5)
CST (-,-5)(1,)
- 3x²+26x-9>0
x= (-26√676+108) / 6
x= (-26√784) / 6
x=(-2628) / 6
x1 = 1/3
x2=-9
(3x-1)(x+9)>0
Caso 1
3x-1>0 | x+9>0
3x>1 | x>-9
x>1/3
CS (1/3, )
Caso 2
3x-1<0>, -9)
CST (-, -9) (1/3, )
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