\(\left|x-3\right|=9-2x\\ \Leftrightarrow\left[{}\begin{matrix}x-3=9-2x\\x-3=2x-9\end{matrix}\right.\\ \Leftrightarrow\left[{}\begin{matrix}x=4\\x=6\end{matrix}\right.\)
Tính:
a) \(\dfrac{9-3x}{x^2+3x+4}-\dfrac{3x-23}{\left(1-x\right)\left(x+4\right)}\)
b) \(\dfrac{4-x}{x^3+2x}-\dfrac{x+5}{x^3-x^2+2x-2}\)
c)\(\dfrac{x^2-3}{x^3+2x^2-x-2}-\dfrac{x}{2-x-x}\)
bài 1: tính
a, A= 2x-9/x2-5x+6 - x+3/x-2 - 2x+1/3-x
b, B= 2x+1/x2-7x+12 - x+3/x-4 + 2x+1/x-3
c, C= x+2/x+3 - 5/x2+x-6 + 1/2-x
d, D= 3(x2+x-3)/x2+x-2 + x+3/x+2 - x-2/x-1
a)\(\dfrac{2}{x+2}-\dfrac{1}{x+3}+\dfrac{2x+5}{\left(x+2\right)\left(x+3\right)}\)
b)\(\dfrac{2}{x+1}-\dfrac{1}{x+5}+\dfrac{2x+6}{\left(x+5\right)\left(x+1\right)}\)
c)\(\dfrac{-6}{x^2-9}-\dfrac{1}{x+3}+\dfrac{3}{x-3}\)
d)\(\dfrac{x}{x-2}-\dfrac{x}{x+2}+\dfrac{8}{x^2-4}\)
a) A = 6x / 2x - 3 - 9 / 2x - 3
b) B = y / x2 + 1 / xy
c) C = ( x / x mũ 2 - 64 - x - 8 /x mũ 2 + 8x
giúp mình zs mnggg
a) \(\dfrac{2^2}{x^2-1}\) - \(\dfrac{6}{3-x}\)- \(\dfrac{2x-6}{x^3-3x-x+3}\)
b) \(\dfrac{x+3}{x^2-6x}\)- \(\dfrac{x+9}{x-2x-24}\) + 1
Thực hiện các phép tính sau :
a) \(\dfrac{x^3-x^2+x-1}{x^2-4}-\dfrac{x-2}{x^2+3x+2}-\dfrac{3x}{x^2-x-2}-\dfrac{2x+5}{\left(x+1\right)\left(4-x^2\right)}\)
b) \(\dfrac{19^2-30x+9}{2x^3+54}-\dfrac{x^3-3}{2^2+6x}-\dfrac{3x^2}{2x^2-6x+18}\)
6.Thực hiện phép tính:
a/\(\dfrac{x-3}{x}-\dfrac{x}{x-3}+\dfrac{9}{x^2-3x}\)
b/\(\dfrac{1}{x-2}-\dfrac{6x}{x^3-8}+\dfrac{x-2}{x^2+2x+4}\)
Thực hiện các phép tính :
a) \(\dfrac{x+1}{x-3}-\dfrac{1-x}{x+3}-\dfrac{2x\left(1-x\right)}{9-x^2}\)
b) \(\dfrac{3x+1}{\left(x-1\right)^2}-\dfrac{1}{x+1}+\dfrac{x+3}{1-x^2}\)
a) x+1/2x-6-4/2x-6 b) 3x-4/6x+3-x-5/6x+3
c) x-1/x-3-3x-8/3-x+3-2x/x-3 d) 3/x+5-5/x-7
e) 3/x+5-5/x-7 f) 2/x-2+3/x+2+5x-18/x2-4
