Advertisements
Advertisements
प्रश्न
Find the squares of the following:
`(7x)/(9y) - (9y)/(7x)`
उत्तर
`((7x)/(9y) - (9y)/(7x))^2`
= `((7x)/(9y))^2 + 2((7x)/(9y))((9y)/(7x)) + ((9y)/(7x))^2`
= `(49x^2)/(81y^2) + 2 + (81y^2)/(49x^2)`.
APPEARS IN
संबंधित प्रश्न
Simplify `(x^2 + y^2 - z)^2 - (x^2 - y^2 + z^2)^2`
If a + b + c = 9 and ab + bc + ca = 23, find the value of a2 + b2 + c2.
If \[x^4 + \frac{1}{x^4} = 194,\] find \[x^3 + \frac{1}{x^3}, x^2 + \frac{1}{x^2}\] and \[x + \frac{1}{x}\]
If x = −2 and y = 1, by using an identity find the value of the following
If \[a^2 + \frac{1}{a^2} = 102\] , find the value of \[a - \frac{1}{a}\].
If a + b + c = 0, then write the value of \[\frac{a^2}{bc} + \frac{b^2}{ca} + \frac{c^2}{ab}\]
If a - b = 0.9 and ab = 0.36; find:
(i) a + b
(ii) a2 - b2.
Simplify by using formula :
(2x + 3y) (2x - 3y)
Evaluate the following without multiplying:
(1005)2
Expand the following:
`(1/x + y/3)^3`
