A=\(\frac{4x}{2x-5}-\frac{10}{2x-5}=\frac{2\left(2x-5\right)}{2x-5}=2\)
B=\(\frac{1}{xy}+\frac{x}{y^2}=\frac{y+x^2}{xy^2}\)
A=\(\frac{4x}{2x-5}-\frac{10}{2x-5}=\frac{2\left(2x-5\right)}{2x-5}=2\)
B=\(\frac{1}{xy}+\frac{x}{y^2}=\frac{y+x^2}{xy^2}\)
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) \(\dfrac{x+9}{x^2-9}-\dfrac{3}{x^2+3x}\)
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.
Cho biểu thức: B=x^2+2x/2x+10+x-5/x+50-5x/2x(x+5)
a. Tìm điều kiện xác định của B.
b. Rút gọn biểu thức B.
c. Tìm x để B = 1.
Làm tính trừ các phân thức sau :
a) \(\dfrac{4x-1}{3x^2y}-\dfrac{7x-1}{3x^2y}\)
b) \(\dfrac{4x+5}{2x-1}-\dfrac{5-9x}{2x-1}\)
c) \(\dfrac{11x}{2x-3}-\dfrac{x-18}{3-2x}\)
d) \(\dfrac{2x-7}{10x-4}-\dfrac{3x+5}{4-10x}\)
Giúp mình với ạ!!! ai trả lời nhanh mình tick luôn nhé
a, \(\frac{2x^2-x}{x^2+x+1}+\frac{x^3-2x^2}{x^2+x+1}+\frac{x-1}{x^2+x+1}\)
b, \(\frac{2x+y}{x\left(y^2-x\right)}-\frac{2x-y}{x\left(y^2-x\right)}\)
c, \(\frac{4}{x+2}+\frac{3}{x-2}+\frac{-5-2}{x^2-4}\)
d, \(\frac{1-2x}{2x}+\frac{2x}{2x-1}+\frac{1}{2x-4x^2}\)
e, \(\frac{1}{x-y}+\frac{3xy}{y^3-x^3}+\frac{x-y}{x^2+xy+y^2}\)
f, \(\frac{3}{x^2+2xy+y^2}+\frac{4}{2xy-x^2-y^2}+\frac{5}{x^2-y^2}\)
\(\dfrac{-4x^2}{x^2-25}\)-\(\dfrac{2x^2+x}{x^2-25}\)-\(\dfrac{2x}{5-x}\)
quy đồng các phân thức sau :
1) x/x-5 ; x+1
2) x/2x-8 ; x-1/4x-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
Thực hiện các phép tính sau :
a) \(\dfrac{3}{2x+6}-\dfrac{x-6}{2x^2+6x}\)
b) \(\dfrac{1}{xy-x^2}-\dfrac{1}{y^2-xy}\)