![\frac{x+3}{ x^{2} -4} \leq 0](https://tex.z-dn.net/?f=%20%5Cfrac%7Bx%2B3%7D%7B%20x%5E%7B2%7D%20-4%7D%20%20%5Cleq%200)
![\frac{x+3}{ (x-2)(x+2)} \leq 0](https://tex.z-dn.net/?f=%20%5Cfrac%7Bx%2B3%7D%7B%20%28x-2%29%28x%2B2%29%7D%20%20%5Cleq%200)
- + - +
--------------------[-3]-----------(-2)-----------(2)-----------------
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Ответ:
![(-](https://tex.z-dn.net/?f=%28-)
∞
![; -3]](https://tex.z-dn.net/?f=%3B%20-3%5D)
∪
![(-2;2)](https://tex.z-dn.net/?f=%28-2%3B2%29)
2a(c+d)-5b(c-d) = 2a(c+d)+5b(c+d)=(2a+5b)(c+d)
1 в корне из 6 = 1 , 1-100= -99
Х-√х-12=0
D=1-4×1×(-12)=1+48=49=7
x1=1+7/2=4 х2=1-7/2=-3
(х^2+3х)^2+2(х^2+3)-24=0
х^4+6х^3+11х-18=0
Замена: x^2=z
z^2+6z-7=0
D=36-4×1×(-7)=36+28=64=8
x1=-6+8/2=1 x2=-6-8/2=-7