Mysha07 Mysha07

15-06-2020
Mathematics

contestada

x^2+1/x^2=18 find x-1/x

Respuesta :

LammettHash LammettHash

15-06-2020

Notice that

[tex]\left(x-\dfrac1x\right)^2=x^2-2+\dfrac1{x^2}=18-2=16[/tex]

which tells us

[tex]x-\dfrac1x=\pm4[/tex]

Answer Link

Otras preguntas

Which word in the sentence does the underlined phrase explain? The guide, a local historian, was able to answer all of our questions. a. questions b. our c.

Six rectangles each with a common base width of 2 have lengths of 1,4,9,16,25 , and 36 . What is the sum of the areas of the six rectangles?

how does the representative assist with passing laws?

In front of you is a slow-moving truck you want to pass. You see no vehicles coming from the other direction. What four things should you consider as you decide

write an expressions for the calculation double 9 and then add 27. write twelve and five hundred ninety nine thousandths in standard form. write an expressions

Which of the following is a breach of etiquette? a. A girl quietly reads a book at the library b. A man stands in line at a crowded bank c. A woman talks on her

Goldsmith believed that an excess of anything can lead to unhappiness. True or false

how does the representative assist with passing laws?

This was considered the first attempt by the United States to create a Constitution; however, the document was viewed as weak by some leaders. Question 2 option

Six rectangles each with a common base width of 2 have lengths of 1,4,9,16,25 , and 36 . What is the sum of the areas of the six rectangles?