1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Ilya [14]
3 years ago
6

If (x^2+1)/x = 7 find x^2+(1/x^2)

Mathematics
1 answer:
White raven [17]3 years ago
4 0

Answer:

x²+(1/x²) = 47

Step-by-step explanation:

by identity : (a+b)² = a²+b²+2ab

(x+1/x)²= x²+(1/x)²+2(x)(1/x)

(x+1/x)²= x²+(1/x²)+2....(1)

since : (x²+1)/x = 7

(x²/x) +(1/x) = 7

x + (1/x )= 7

put the value for : x +(1/x) in (1) :

49 = x²+(1/x²)+2

x²+(1/x²) = 47

You might be interested in
At the beginning of March, a store bought a fancy watch at a cost of $250 and marked it up 20%. At the end of the month, the fan
alexandr402 [8]

Answer:

$270

Step-by-step explanation:

Price after markup was 1.20($250) = $300

Price after discounting:  (1.00 - 0.10)($300) = $270

7 0
3 years ago
Help me please I can’t figure it out
Wittaler [7]

Answer:

2 m

Step-by-step explanation:

The bottom length of the bottom cuboid is equal to the top length of the bottom cuboid.

8 = 3 + c + 3

8 = c + 6

8 - 6 = c

2 = c

6 0
3 years ago
Read 2 more answers
Y + 8 = 2 i need help!!!!!
sergey [27]

Answer:

y = -6

Step-by-step explanation:

-6 + 8 = 2

3 0
3 years ago
Read 2 more answers
Leah has $4.35 in her pocket in nickels and dimes. The number of dimes is 2 less than 3 times the number of nickels. How many of
Maksim231197 [3]
Okay so this is very easy so basically count the value of each coin then subtract to get *gets a call* hello? *other person starts talking* I just want you to know that the answer is 4 *hangs up* *starts talking* that was weird anyways the answer is four give
6 0
2 years ago
Read 2 more answers
Glenn Andrews recently bought a new motorbike for $3,950. If he had to pay 6 percent sales tax on the
GalinKa [24]
The total amount of money he had to pay for the bike is $3,954.02 because 6 percent of 7 is 4.2
4 0
3 years ago
Other questions:
  • Frank started out in his car travelling 45 mph. When Frank was 1 3 miles away, Daniel started out from the same point at 50 mph
    9·1 answer
  • There are 7 days in a week how many are in 16 weeks?​
    15·2 answers
  • Plz help if you know THANK YOU SO MUCH?BIG POINTS ON THIS TO FOR WHO EVER ANSWERS
    14·1 answer
  • The quotient of 5n and 8
    15·1 answer
  • A recipe for apple cider calls for 5 cups of apple juice and 3 cups of water.Wich equation can be used to find x the percent of
    6·1 answer
  • 1. After quarantine is over, you and your family are planning to rent a van for a 1-day trip to Knott’s Berry Farm in Buena Park
    7·1 answer
  • Relative humidity (%)= actual moisture content ___________________ x 100 saturation moisture content if the actual moisture cont
    15·1 answer
  • I need help and thanks
    14·1 answer
  • James bought 24 bags of stickers.Each bag had 4 stickers.how many stickers did he buy?
    7·2 answers
  • (4,8), m=5 need a step by step answer please
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!