Câu 2 : Xét dấu các biểu thức sau :
A = \(\frac{4-3x}{2x+1}\)
B = \(1-\frac{2-x}{3x-2}\)
C = \(x\left(x-2\right)^2\left(3-x\right)\)
D = \(\frac{x\left(x-3\right)^2}{\left(x-5\right)\left(1-x\right)}\)
E = \(-x^2+x+6\)
F = \(2x^2-\left(2+\sqrt{3}\right)x+\sqrt{3}\)
G = \(\left(3x-1\right)\left(x+2\right)\)
H = \(\frac{2-3x}{5x-1}\)
K = \(\left(-x+1\right)\left(x+2\right)\left(3x+1\right)\)
L = \(2-\frac{2+x}{3x-2}\)
M = \(9x^2-1\)
N = \(-x^3+7x-6\)
O = \(x^3+x^2-5x+3\)
P = \(x^2-x-2\sqrt{2}\)
Q = \(\frac{1}{3-x}-\frac{1}{3+x}\)
R = \(\frac{x^2-6x+8}{x^2+8x-9}\)
S= \(\frac{x^2+4x+4}{x^4-2x^2}\)
T = \(\frac{\left|x+1\right|-1}{x^2+x+1}\)
