\(=\dfrac{3x+6x^2+2x-4x^2}{\left(1-2x\right)\left(1+2x\right)}\cdot\dfrac{\left(1-2x\right)^2}{x\left(2x+5\right)}\)
\(=\dfrac{1-2x}{1+2x}\)
Rút gọn : \(\left(\frac{1}{2x-y}+\frac{3y}{x^2-4x^2}-\frac{2}{2x+y}\right):\left(\frac{4x^2+y^2}{4x^2-y^2}+1\right)\)
rút gọn : \(\left(\frac{x}{x^2-16}-\frac{x-4}{x^2+4x}\right):\frac{2x-4}{x^2+4x}\)
Rút gọn C = \(\frac{x}{x-3}-\frac{x^2+3x}{2x+3}.\left(\frac{x+3}{x^2-3x}-\frac{x}{x^2-9}\right)\)
Tính: \(\frac{1-5x-4x^2}{x^3+2x^2-x-2}-\frac{3x+1}{2-x-x^2}\)
Rút gọn: \(\frac{x+3}{2x-2}-\frac{4}{x^2-1}\times\frac{x+1}{2}\)
1, tính :
\(\left(\frac{1}{2}-1\right).\left(\frac{1}{3}-1\right)..........\left(\frac{1}{2004}-1\right)\left(\frac{1}{2005}-1\right)\)
2, tìm x \(\frac{4x}{2x-\frac{1}{5}}>0\)
T ính: \(\frac{1-5x-4x^2}{x^3+2x^2-x-2}-\frac{3x+1}{2-x-x^2}\)
\(\frac{5}{3}\left(3x-3\right)+\frac{1}{2}=\frac{1}{2}\left(2x-1\right)\) \(\frac{-4}{3}\left(x-\frac{1}{4}\right)=\frac{3}{2}\left(2x-1\right)\) ai giup minh voi nhanh nhanh
tìm x biết :
a) \(\frac{2x+3}{5x+2}=\frac{4x+5}{10x+2}\)
b) \(\frac{3x-1}{40-5x}=\frac{25-3x}{5x-34}\)
