$$\left(-\infty;0\right)$$  

$$\left(-2;+\infty\right)$$  

$$\left(-\infty;2\right)$$  

$$\left(0;+\infty\right)$$  

$$x<-\frac{3}{2}$$  

$$x\le-\frac{2}{3}$$  

$$x>-\frac{3}{2}$$  

$$x\ge-\frac{2}{3}$$  

$$\left(3;+\infty\right)$$  

$$\left(-\infty;3\right)$$  

$$\left[3;+\infty\right)$$  

$$\left(-\infty;3\right]$$  

$$f\left(x\right)>0\Longleftrightarrow x\in\left(2;+\infty\right)$$  

$$f\left(x\right)<0\Longleftrightarrow x\in\left(-\infty;-2\right)$$  

$$f\left(x\right)>0\Longleftrightarrow x\in\left(-2;+\infty\right)$$  

$$f\left(x\right)=0\Longleftrightarrow x=-2$$  

$$f\left(x\right)=x-2$$  

$$f\left(x\right)=-x-2$$  

$$f\left(x\right)=16-8x$$  

$$f\left(x\right)=2-4x$$  

$$f\left(x\right)=\left(x+1\right)\left(x-2\right)$$  

$$f\left(x\right)=\frac{x+1}{x-2}$$  

$$f\left(x\right)=\frac{x-1}{x+2}$$  

$$f\left(x\right)=\left(x-1\right)\left(x+2\right)$$  

$$f\left(x\right)=-x-1$$  

$$f\left(x\right)=\frac{x-1}{\left(x-1\right)^2}$$  

$$f\left(x\right)=\frac{-10}{x+1}$$   

$$f\left(x\right)=-x+1$$  

$$f\left(x\right)=x\left(x-2\right)$$  

$$f\left(x\right)=x-2$$  

$$f\left(x\right)=\frac{x}{x+2}$$  

$$f\left(x\right)=x\left(2-x\right)$$  

$$\left(-\infty;-\frac{1}{2}\right)$$  

$$\left(-\infty;\frac{1}{2}\right)$$  

$$\left(-\frac{1}{2};+\infty\right)$$  

$$\left(\frac{1}{2};+\infty\right)$$