lalo82 lalo82
  • 04-08-2018
  • Mathematics
contestada

(1/x-2)-(1/x+2)=
(A)=0
(B)=-(1/4)
(C)=(-4/x^(2))
(D)=(4/x^(2)-4)
(E)=(2x/x^(2)-4)
show work

Respuesta :

gmany
gmany gmany
  • 04-08-2018

[tex] \dfrac{1}{x-2}-\dfrac{1}{x+2}=\dfrac{x+2}{(x-2)(x+2)}-\dfrac{x-2}{(x-2)(x+2)}\\\\=\dfrac{(x+2)-(x-2)}{(x-2)(x+2)}=\dfrac{x+2-x+2}{(x-2)(x+2)}=\dfrac{4}{x^2-4}\to(D) [/tex]

Used: [tex]a^2-b^2=(a-b)(a+b)[/tex]

Answer: (D)=(4/x^(2)-4)

Answer Link

Otras preguntas

Need Help ASAP!! Help Please!!!!! Small in population Small in territory Vatican City This list is describing which category of country? A) Enclave B) Mic
What kind of triangle has angle measurements of 13 degrees 129 degrees and 38 degrees
The figure shown is made up of a triangle and a square. The perimeter of the figure is 28 inches. Complete the | description to find the area of the figure.
Find the missing length of the triangle
WILL MARK BRAINLIEST!!Which of these is a compound event?A.Getting a sum of 4 on a roll of two dice.B.Getting heads on a coin toss.C.Getting a 4 on a roll of
What does pony boy give in the outsiders
ATRI has vertices T(-2,5), R(2,5), and I(0, -3). Is ATRI scalene, isosceles, or equilateral? Is ATRI scalene, isosceles, or equilateral? scalene isosceles equil
Draw a line from each figure to an area
Which of the following is part of the "new media"?Less international newsOB. More television channelsOC. Less reality televisionOD. More professional sports​
44.24 to 1 decimal point