Advertisements
Advertisements
Question
If `3"x"-1/(3"x")=5`, find : `9"x"^2+1/(9"x"^2)`
Sum
Advertisements
Solution
`9"x"^2+1/(9"x"^2)=(3"x"-1/(3"x"))^2+2`
= (5)2 + 2
= 25 + 2
= 27
shaalaa.com
Important Formula of Expansion
Is there an error in this question or solution?
APPEARS IN
RELATED QUESTIONS
Expand: `("a"+1/(2"a"))^2`
Expand : `(2"a"-1/"a")^2`
Expand : (a−b+c)2
Expand : `(2"x"-1/(2"x"))^2`
Find the square of `3"x"+2/"y"`
Find the square of `8"x"+3/2"y"`
If `"a" +1/"a"=2`, find : `"a"^2+1/"a"^2`
If `"m" -1/"m"=5`, find : `"m"^2+1/"m"^2`
If `2"a"+1/(2"a")=8`, find : `16"a"^4+1/(16"a"^4)`
Expand : (2a – 5b – 4c)2
