Sửa đề: \(\dfrac{4x-1}{10x^2+2x}\cdot\dfrac{25x^2+10x+1}{16x^2-1}\)
\(=\dfrac{4x-1}{2x\left(5x+1\right)}\cdot\dfrac{\left(5x+1\right)^2}{\left(4x-1\right)\cdot\left(4x+1\right)}\)
\(=\dfrac{4x-1}{4x-1}\cdot\dfrac{5x+1}{5x+1}\cdot\dfrac{5x+1}{2x\left(4x+1\right)}\)
\(=\dfrac{5x+1}{2x\left(4x+1\right)}\)
thực hiện phép tính
a)\(\dfrac{1}{x-5x^2}\)-\(\dfrac{25x-15}{25x^2-1}\)
b)(-\(\dfrac{1}{x^2-4x}+\dfrac{2}{16-x^2}-\dfrac{-1}{4x+16}\))\(\div\dfrac{1}{4x}\)
thực hiện phép tính
\(\dfrac{1}{3x-2}-\dfrac{1}{3x+2}-\dfrac{3x-6}{9x^2-4}\)
\(\dfrac{x+25}{2x^2-50}-\dfrac{x+5}{x^2-5x}-\dfrac{5-x}{2x^2+10x}\)
\(\dfrac{1-2x}{2x}-\dfrac{4x}{2x-1}-\dfrac{3}{2x-4x^2}\)
thực hiện phép tính
\(\dfrac{x^2-50}{3x^2-9x}:\dfrac{2x^2+10x}{x^2-9}\)
\(\dfrac{-3x^2}{2x+1}:\left(-\dfrac{9}{4x^2-1}\right)\)
thực hiện phép tính
\(\dfrac{x^2-50}{3x^2-9x}\):\(\dfrac{2x^2+10x}{x^2-9}\)
\(\dfrac{-3x^2}{2x+1}:\left(-\dfrac{9}{4x^2-1}\right)\)
thực hiện phép tính
\(\dfrac{11x}{2x-3}+\dfrac{x-18}{2x-3}\)
\(\dfrac{2x+12}{4x^2-9}+\dfrac{2x+5}{4x-6}\)
\(\dfrac{x}{2x+1}+\dfrac{-1}{4x^2-1}+\dfrac{2-x}{2x-1}\)
Thực hiện phép tính sau:
a) \(2x\left(1+\dfrac{1}{2}x^2-\dfrac{5}{2}x^3\right)\)
b) \(\dfrac{4x}{2x-1}-\dfrac{7x+3}{4x^2-1}\)
Thực hiện phép tính: (câu nào khó quá bỏ qua)
a) \(\dfrac{x^2+2}{x^3+1}\)-\(\dfrac{1}{x+1}\)
b)\(\dfrac{x}{x^2-2x}\)-\(\dfrac{x^2+4x}{x^3-4x}\)-\(\dfrac{2}{x^2+2x}\)
c)\(\dfrac{1}{2-2x}\)-\(\dfrac{3}{2+2x}\)+\(\dfrac{2x}{x^2-1}\)
d) \(\dfrac{1}{\left(a-b\right)\left(b-c\right)}\)+\(\dfrac{1}{\left(b-c\right)\left(c-a\right)}\)+\(\dfrac{1}{\left(c-a\right)\left(a-b\right)}\)
À mà nay sinh nhật tui á
thực hiện phép tính
\(\dfrac{4x^2+8x}{\left(2-x\right)\left(2+x\right)}:\dfrac{1-2x}{2-x}\)
Thực hiện phép tính:
a) \(\dfrac{x}{2x-y}-\dfrac{2x-y}{4x-2y}\)
b)\(\dfrac{3x+1}{x^2-1}-\dfrac{x}{2x-2}\)
c) \(\dfrac{x-2}{x^2-4}-\dfrac{-8-x}{3x^2+6x}\)
d) \(\dfrac{2}{2x-3}-\dfrac{x}{2x+3}-\dfrac{2x+1}{9-4x^2}\)
Thực hiện phép tính:
a, \(\dfrac{x^2}{x+1}-\dfrac{2x}{x^2-1}-\dfrac{1}{1-x}+1\)
\(b,\dfrac{2x+y}{2x-y}+\dfrac{8xy}{y^2-4x^2}+\dfrac{2x-y}{2x+y}\)
