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

which point lies on a circle with a radius of 5 units and center at P(6,1)? a. Q(1, 11) b. R(2, 4) c. S(4, -4) d. T(9, -2)
Solve the triangle for x.
When a small volume of NaOH solution is added to a acetate/acetic acid buffer system, which of the following occur? a. The pH will increase. b. The concentratio
Sheila had 8 yards of fabric.she used 2/3 of the fabric on a project. How many yards does she have left?
x+y=9 xy=7 (simultaneous equations) solve
To move a heavy couch across a carpeted floor what could be used to decrease the frictional force
Explain why the force of gravity will allow you to extend your forearm even if the triceps brachii is not functioning
dry cleaning bill is shown by y equals 1.50 x + 4.50 y is the total cost and x is the number of shirts graph this equation​
Which sentence uses correct capitalization?
Help ASAP if u know this