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

Emeka is thrice as old as Dora and Dora is7 years older than Dupe. If the sum of theirages is 38, how old is Dupe?A 2 yearsyears B 7 yearsD 31 years E 73 years

The earth is approximately 8.0x10^3 miles in diameter, from pole to pole. What number is the distance equivalent to? A. 800 thousand miles B. 80 thousand mile

Rob's school is selling tickets to a spring musical. On the first day of ticket sales the school sold 3 adult tickets and 1 student ticket for a total of $15.

Identify which reactants is reduced and which is oxidized . 2Au^3+(aq) + 3Cd(s) -> 2au(s) + 3Cd^2+(s) Please help

What is the scope of hazard review in a worksite analysis

What happens when the limiting reactant of a reaction runs out? O excess reactants begin combining. O reaction stops O reaction slows down. O reaction speeds up

Between which interval is the charge a fixed rate?

The diagram shows different forms of thermal energy transfer. What do the flames below the pot represent?

Wilson Co. produces tennis rackets. A customer has offered Wilson Co. $400 per unit for 200 units. To fill the order, Wilson would incur unit-level costs of $30

How do tribal councils and tribes benefit from money made through casinos? They pay tribal sovereignty fees with casino profits. PLZ HELP MEEEEE They use money