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

7. Describe the strategic, political, and operational aspects of human resources management. Give examples.
Explain one way in which an artist of the late 20th and early 21st century has referred to the work of an earlier artist (art made before 1945) in their own wor
a) The pass marks in an examination is 40%. Rajani secured 295 marks andfailed by 25 marks. Find the full marks of the examination​
Your English teacher has asked you to write a storyYour story must begin with this sentence:A girl was walking home one day.(100 words​
A baseball bat that originally sold for $65 is on sale at a 15% discount. Which single gift card amount would cover the complete cost of the discounted bat? Sel
D) 3. Two objects will attract one another when they have what
CAN SOMEONE PLEASE HELP ME I NEED IT TO PASS THIS CLASS
Drag each statement to the correct location on the table. Match the characteristics with the states of matter. does not have a definite shape or volume has defi
please help it's the last question
if you could show the work or an explanation