Arzeebo Arzeebo

01-02-2016
Mathematics

contestada

x+ 1/x =5 what is the value x²+1/x²?

Respuesta :

Billymkhoi Billymkhoi

01-02-2016

x+ 1/x= 5
⇒ (x+ 1/x)^2= 5^2
⇒ (x+ 1/x)^2= 25
⇒ x^2+ 2(x)(1/x)+ 1/x^2= 25
⇒ (x^2+ 1/x^2)+ 2*1= 25
⇒ x^2+ 1/x^2= 25 -2
⇒ x^2+ 1/x^2= 23

The final answer is 23~

Answer Link

Otras preguntas

Identify the pun on the word "bye" How is it used? From Twelfth night Act 3 scene 1.

a line is represented by the equation 3x+2y=4. what is another way to represent the same line?

Which statement about King Henry II of England is correct? A. He forced rebellious lords to sign the Magna Carta, swearing allegiance to him. B. He installed a

Enter the word that best completes the sentence. Word Bank bearing lark plume turf When people don’t agree about who has control of an area, they argue about th

Please help me ASAP!!! How does the poet use imagery in "Do Not Go Gentle into That Good Night"? A. to develop a sense of life's possibilities B. to contrast

AP US History question: How do you account for the development of political parties in the United States during the period 1787-1800?

A bird owner wants to purchase birdseed from the local pet store. Sunflower seeds sell for $8 per pound and regular bird seed sells for $6 per pound. How ma

What do the pool players who speak in "We Real Cool" take pride in? A. their defiance of rules B. their plans for the future C. their skill at billiards D. thei

How Do You Do: 2(n-7)+3=9 And: 4h+7h-16=6

help please !! Who might be the main characters in a world parents type of creation story? a turtle and a raven a powerful god and a human the sky and the earth