\(=\dfrac{x+3}{x-2}-\dfrac{4+x}{x-2}\)
\(=\dfrac{x+3-4-x}{x-2}\)
\(=-\dfrac{1}{x-2}\)
Mấy bài này rất cơ bản nên bạn đừng vội gửi câu hỏi mà hãy suy nghĩ trước khi đăng nhé. Chúc bạn học tốt!
\(\dfrac{y}{2x^2-xy}+\dfrac{4x}{y^2-2xy}\)
\(\dfrac{1}{x+2}+\dfrac{3}{x^2-4}+\dfrac{x-14}{\left(x^2+4x+4\right).\left(x-2\right)}\)
\(\dfrac{1}{x+2}+\dfrac{1}{\left(x+2\right).\left(4x+7\right)}\)
\(\dfrac{1}{x+3}+\dfrac{1}{\left(x+3\right).\left(x+2\right)}+\dfrac{1}{\left(x+2\right).\left(4x+7\right)}\)
a) \(\dfrac{x^2-x}{x-2}+\dfrac{4-3x}{x-2}\)
b) \(\dfrac{a+2b}{3a-b}+\dfrac{2a-5b}{b-3a}\)
c) \(\dfrac{2}{x^2-9}+\dfrac{1}{x+3}\)
d) \(\dfrac{4x}{x^2-4}+\dfrac{x}{x+2}+\dfrac{2}{x-2}\)
e) \(\dfrac{3x^2-x+3}{x^3-1}+\dfrac{1-x}{x^2+x+1}+\dfrac{2}{1-x}\)
f) \(\dfrac{1}{x^2+3x+2}+\dfrac{1-x}{x^2+x+1}+\dfrac{2}{1-x}\)
g) \(\dfrac{a^3}{\left(a-b\right)\left(a-c\right)}+\dfrac{b^3}{\left(b-a\right)\left(b-c\right)}+\dfrac{c^3}{\left(c-a\right)\left(c-b\right)}\)
h) \(\dfrac{1}{1-x}+\dfrac{1}{1+x}+\dfrac{2}{1+x^2}+\dfrac{4}{1+x^4}+\dfrac{8}{1+x^8}\)
A=\(\dfrac{x-2}{x+2}-\dfrac{x}{x-2}-\dfrac{9x+2}{4-x^2}\)
CM A=\(\dfrac{3}{x-2}\)
1. \(\dfrac{x-1}{x+1}+\dfrac{-\left(x+1\right)}{x-1}+\dfrac{4}{x^2-1}\)
2. \(\dfrac{4-2x+x^2}{2+x}+\left(-2-x\right)\)
3. \(\dfrac{x^3+4x^2+x-6}{x^3+2x^2-x-2}\)
4. \(\dfrac{ab+cx+ax+bx}{ay+2cx+2ax+cy}\)
Giúp mình với, mình đang cần gấp
\(\dfrac{x^3}{1-x}\) + x2 + x + 1
\(\dfrac{2x}{x^2+4x+4}\) + \(\dfrac{x+1}{x+2}\) + \(\dfrac{2-x}{\left(x+2\right)^2}\)
Xin cảm ơn <3
Làm tính cộng các phân thức :
a) \(\dfrac{11x+13}{3x-3}+\dfrac{15x+17}{4-4x}\)
b) \(\dfrac{2x+1}{2x^2-x}+\dfrac{32x^2}{1-4x^2}+\dfrac{1-2x}{2x^2+x}\)
c) \(\dfrac{1}{x^2+x+1}+\dfrac{1}{x^2-x}+\dfrac{2x}{1-x^3}\)
d) \(\dfrac{x^4}{1-x}+x^3+x^2+x+1\)
Làm tính cộng :
a) \(\dfrac{5x+30}{x^3-x^2-6x}+\dfrac{4x+12}{x^2+2x}+\dfrac{x}{3-x}\)
b) \(\dfrac{x}{x+1}+\dfrac{1}{1-x^2}+\dfrac{x^5+x+1}{x^4+x^3-x-1}\)
Làm các phép tính sau :
a) \(\dfrac{y}{2x^2-xy}+\dfrac{4x}{y^2-2xy}\)
b) \(\dfrac{1}{x+2}+\dfrac{3}{x^2-4}+\dfrac{x-14}{\left(x^2+4x+4\right)\left(x-2\right)}\)
c) \(\dfrac{1}{x+2}+\dfrac{1}{\left(x+2\right)\left(4x+7\right)}\)
d) \(\dfrac{1}{x+3}+\dfrac{1}{\left(x+3\right)\left(x+2\right)}+\dfrac{1}{\left(x+2\right)\left(4x+7\right)}\)
Thực hiện phép tính
a) \(\dfrac{x}{xy-y^2}+\dfrac{2x-y}{xy-x^2}\)
b) \(\dfrac{x^2+2}{x^3-1}+\dfrac{x}{x^2+x+1}+\dfrac{1}{1-x}\)
c) \(\left(x-1\right)-\dfrac{x^2-4}{x+1}\)
d) \(\dfrac{x}{x^2-2x}-\dfrac{x^2+4x}{x^3-4x}-\dfrac{2}{x^2+2x}\)
1) \(\dfrac{1}{x^2+6x+9}+\dfrac{1}{6x-x^2+9}+\dfrac{x}{x^2-9}\) 2) \(\dfrac{x^2+2}{x^3-1}+\dfrac{2}{x^2+x+1}+\dfrac{1}{1-x}\) 3) \(\dfrac{x-3}{x+1}-\dfrac{x+2}{x-1}+\dfrac{8x}{x^2-1}\)