C = \(\dfrac{x^2+2x}{2x+10^{ }}+\dfrac{x-5}{x}+\dfrac{50-5x}{2x\left(x+5\right)}\)
a, Tìm ĐKXĐ và rút gọn C
b, Tìm x để P được \(\dfrac{1}{4}\)
Rút gọn các phân thức :
a) \(\dfrac{14xy^5\left(2x-3y\right)}{21x^2y\left(2x-3y\right)^2}\)
b) \(\dfrac{8xy\left(3x-1\right)^3}{12x^3\left(1-3x\right)}\)
c) \(\dfrac{20x^2-45}{\left(2x+3\right)^2}\)
d) \(\dfrac{5x^2-10xy}{2\left(2y-x\right)^3}\)
e) \(\dfrac{32x-8x^2+2x^3}{x^3+64}\)
f) \(\dfrac{9-\left(x+5\right)^2}{x^2+4x+4}\)
g) \(\dfrac{80x^3-125x}{3\left(x-3\right)-\left(x-3\right)\left(8-4x\right)}\)
h) \(\dfrac{5x^3+5x}{x^4-1}\)
i) \(\dfrac{x^2+5x+6}{x^2+4x+4}\)
Rút gọn phân thức :
a) \(\dfrac{x^4-y^4}{y^3-x^3}\)
b) \(\dfrac{\left(2x-4\right)\left(x-3\right)}{\left(x-2\right)\left(3x^2-27\right)}\)
c) \(\dfrac{2x^3+x^2-2x-1}{x^3+2x^2-x-2}\)
Rút gọn phân thức sau:
a)\(\dfrac{3}{2x+6}-\dfrac{x-6}{2x^2+6x}\)
b)\(\dfrac{4}{x+2}+\dfrac{2}{x-2}+\dfrac{5x+6}{4-x^2}\)
c)\(\dfrac{1-3x}{2x}+\dfrac{3x-2}{2x-1}+\dfrac{3x-2}{2x-4x^2}\)
d)\(\dfrac{x^2+2}{x^3-1}+\dfrac{2}{x^2+x+1}+\dfrac{1}{1-x}\)
rút gọn phân thức
a.\(\dfrac{5x-15}{4x+4}:\dfrac{x^2-9}{x^2+2x+1}\)
b.\(\dfrac{6x+48}{7x-7}:\dfrac{x^2-64}{x^2-2x+1}\)
c.\(\dfrac{4x-24}{5x+5}:\dfrac{x^2-36}{x^2+2x+1}\)
d.\(\left(\dfrac{1}{x^2+x}-\dfrac{2-x}{x+1}\right):\left(\dfrac{1}{x}+x-2\right)\)
Thu gọn
a/ 3(x2 – 4) + (3x + 2)(4 – x)
b/ (x + 5)2 + (5x – 1)( x + 3)
giúp mình với , tối nay phải nộp rồi
rút gọn các biểu thức
A=(x^2/x^3-1 - 1/x-1):(1-x+2/x^2 +x +1)
B=(x^2-x+7/x^2-4):(x+2/x-2 - x-2/x+2 - 2x/x^2-4)
C= x^2+1-2x/x-1 + x^2+x/x+1
D= 3/x+1 + 1/1-x - x-3/x^23x
E= x^3-2x^2+28/x^2-3x-4 - x-4/x+1 - x+8/4-x
F=2x-9/x^2-5x+6 - x+3/x-2 - 2x+1/3x
A= 6x/5x-20 - x/x^2-8x+16
A= 4/x+2 + 3/x-2 + 5x+2/4-x^2 - x^2-2x+4/x^3+8
A= ( 6x+1/x^2-6x) + 6x-1/x^2+6x) . x^2-36/x^2+1
A= ( x/x-1 - x+1/x) : ( x/x+1 - x-1/x)
oke nhé , giúp minh với
A= 6x/5x-20 - x/x^2-8x+16
A= 4/x+2 + 3/x-2 + 5x+2/4-x^2 - x^2-2x+4/x^3+8
A= ( 6x+1/x^2-6x) + 6x-1/x^2+6x) . x^2-36/x^2+1
A= ( x/x-1 - x+1/x) : ( x/x+1 - x-1/x)
oke nhé , giúp minh với