Advertisements
Advertisements
प्रश्न
If `"a" + 1/"a" = 6;`find `"a"^2 - 1/"a"^2`
बेरीज
उत्तर
`"a"^2 - 1/"a"^2`
= `("a" + 1/"a")("a" - 1/"a")`
= (6)`(±4sqrt(2))`
= ±24`sqrt(2)`.
shaalaa.com
या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
APPEARS IN
संबंधित प्रश्न
Expand the following, using suitable identity:
(2x – y + z)2
if `x^2 + 1/x^2 = 79` Find the value of `x + 1/x`
If a − b = 4 and ab = 21, find the value of a3 −b3
If \[x - \frac{1}{x} = 5\] ,find the value of \[x^3 - \frac{1}{x^3}\]
If \[x^2 + \frac{1}{x^2} = 98\] ,find the value of \[x^3 + \frac{1}{x^3}\]
If a - b = 0.9 and ab = 0.36; find:
(i) a + b
(ii) a2 - b2.
The number x is 2 more than the number y. If the sum of the squares of x and y is 34, then find the product of x and y.
If m - n = 0.9 and mn = 0.36, find:
m + n
Factorise the following:
4x2 + 20x + 25
Expand the following:
(3a – 5b – c)2
