\(=\dfrac{x}{x\left(x-2\right)}-\dfrac{x^2+4x}{x\left(x-2\right)\left(x+2\right)}-\dfrac{2}{x\left(x+2\right)}\)
\(=\dfrac{x^2+2x-x^2-4x-2x+4}{x\left(x-2\right)\left(x+2\right)}\)
\(=\dfrac{-4x+4}{x\left(x-2\right)\left(x+2\right)}\)
P)(9-x)(x^2+2x-3) n)(-x+3)(x^2+x+1) O)(-6x+1/2)(x^2-4x+2) q)(6x+1)(x^2-2x-3) r)(2x+1)(-x^2-3x+1) U)(2x-3)(-x^2+x+6) s)(-4x+5)(x^2+3x-2) V)(-1/2x+3)(2x+6-4x^3)
V)(-1/2x+3)(2x+6-4c^3) F)(2x-5)(x^2-x+3) W)(3x+1)(x^2-2x-5) X)(6x-3)(x^2+x-1) Y)(5x-2)(3x+1-x^2) Z)(3/4x+1)(4x^2+4x+4)
a)9x2 – 49 = 0
b)(x – 1)(x + 2) – x – 2 = 0
c)(4x + 1)(x - 2) - (2x -3)(2x + 1) = 7
d)x(3x + 2) + (x + 1)2 – (2x – 5)(2x + 5) = 0
e)(x + 3)(x2 – 3x + 9) –x(x – 1)(x + 1) – 27 = 0
f)(4x-3)^2-3x(3-4x)=0
Rút gọn biểu thức:
a, 3(x-y)^2-2(x-y)^2+(x-y)(x+y)
b, (x-2)(x^2+2x+4)-x(x-2)(x+2)+4x
c, 2(2x+5)^2-3(4x+1)(1-4x)
d, 4x^2-12+9/9-4x^2
e, x^4+x^3+x+1/x^4-x^3+2x^2-x+1
rút gọn biểu thức:(8x^3-4x^2):4x-(4x^2-5x):(2x)+(2x)^2
(3x^3-x^2y):x^2-(xy^2+x^2y):(xy)+2x(x-1)
giúp mik
tìm x
a 2 (x^3 - 1 ) - 2x^2 ( x +2x^4 ) + ( 4x^5 +4 ) x =6
b (2x)^2 (4x - 2 ) - ( x^3 -8x^3 )=15
chứng tỏ giá trị của biểu thức sau ko phụ thuộc vào giá trị của biến
a P = x ( 2x + 1 ) - x^2 ( x + 2 ) + x^3 - x +3
b Q = x (2x^2 -4x +8 ) +12x^2 (1/3 _1/6x ) -8x +9
X/x^2-2x - x^2+4x/x^3-4x -2/x^2+2x
rút gọn
x/x^2-2x -x^2+4x/x^3-4x -2/x^2+2x
Thực hiên phép tính
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)\(\dfrac{1}{2-2x}\)-\(\dfrac{3}{2+2x}\)+\(\dfrac{2x}{x^2-1}\)
