\(\dfrac{5x-5}{\left(x+1\right)^2}-\dfrac{20x^2-20x}{3x+3}\\ =\dfrac{5\left(x-1\right)}{\left(x+1\right)^2}-\dfrac{20x\left(x-1\right)}{3\left(x+1\right)}\\ =\dfrac{15\left(x-1\right)}{3\left(x+1\right)^2}-\dfrac{20x\left(x^2-1\right)}{3\left(x+1\right)^2}\\ =\dfrac{15x-15-20x^3+20x}{3\left(x+1\right)^2}\\ =\dfrac{-20x^3+35x-15}{3\left(x+1\right)^2}\)
5x-5/(x+1)^2 : 20x^2-20/3x+3
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
Trừ phân thức:
a) x^2+y^2/(x-y)^3 - 2xy/(x-y)^3.
b) x^2+25y^2/x^2-25y^2 - 10xy/x^2-25y^2.
c)3x/5x+5y - x/10x-10y.
d) 1/x-3 - 3/2x+6 - x/2x^2-12x+18.
e) (x^2-1) - x^4-3x^2-4/x^2+1.
f) 1/3x-2 - 4/3x+2 - 3x-6/4-9x^2.
g) 4x^2-3x+5/x^3-1 - 1-2x/x^2+x+1 - 6/x-1.
h) 5/x+1 - 10/x-x^2-1 - 15/x^3+1.
i) 2/2x+1 - 1/2x-1 - 2/4x^2-1.
Làm tính trừ phân thức :
a) \(\dfrac{3x-2}{2xy}-\dfrac{7x-4}{2xy}\)
b) \(\dfrac{3x+5}{4x^3y}-\dfrac{5-15x}{4x^3y}\)
c) \(\dfrac{4x+7}{2x+2}-\dfrac{3x+6}{2x+2}\)
d) \(\dfrac{9x+5}{2\left(x-1\right)\left(x+3\right)^2}-\dfrac{5x-7}{2\left(x-1\right)\left(x+3\right)^2}\)
e) \(\dfrac{xy}{x^2-y^2}-\dfrac{x^2}{y^2-x^2}\)
f) \(\dfrac{5x+y^2}{x^2y}-\dfrac{5y-x^2}{xy^2}\)
g)\(\dfrac{x}{5x+5}-\dfrac{x}{10x-10}\)
h) \(\dfrac{x+9}{x^2-9}-\dfrac{3}{x^2+3x}\)
làm tính trừ \(\dfrac{5x+y}{xy-5x^2}\)-\(\dfrac{35x^2+8xy+y^2}{xy^225x^3}\)
thực hiện phép tính \(\dfrac{x^3+6x^2-25}{x^3+3x^2-10x}\)-\(\dfrac{x+5}{2x-x^2}\)
Làm tính trừ
\(\dfrac{3x^2+5x+1}{x^3-1}-\dfrac{1-x}{x^2+x+1}-\dfrac{3}{x-1}\)
Rút gọn biểu thức :
a) \(\dfrac{3x^2+5x+1}{x^3-1}-\dfrac{1-x}{x^2-6x+9}-\dfrac{3}{x-1}\)
b) \(\dfrac{1}{x^2-x+1}+1-\dfrac{x^2+2}{x^3+1}\)
c) \(\dfrac{7}{x}-\dfrac{x}{x+6}+\dfrac{36}{x^2+6x}\)
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)\(\dfrac{x^2-3}{x^3+2x^2-x-2}-\dfrac{x}{2-x-x}\)
1) thực hiện phép tính
a) \(\dfrac{x-3}{4x+4}-\dfrac{x-1}{6x-30}\)
b) \(\dfrac{1}{x-5x^2}-\dfrac{25x-15}{25x^2-1}\)
c) \(\dfrac{x+9y}{x^2-9y^2}-\dfrac{3y}{x^2-3xy}\)
d) \(\dfrac{3x+1}{\left(x-1\right)^2}-\dfrac{1}{x+1}-\dfrac{x+3}{1-x^2}\)
e) \(\dfrac{3\left(x-2\right)}{x^2-2x+1}-\dfrac{6}{x^2-1}-\dfrac{3x-2}{1-x^2}\)
