Advertisements
Advertisements
प्रश्न
Evaluate: `(2"a"+1/"2a")(2"a"-1/"2a")`
Advertisements
उत्तर
`(2"a"+1/"2a")(2"a"-1/"2a")`
`=(2"a")^2-(1/"2a")^2` ......[ ∵ (a − b) (a + b) = a2b2]
`=4"a"^2-1/"4a"^2`
APPEARS IN
संबंधित प्रश्न
Write in the expanded form:
`(2 + x - 2y)^2`
Simplify the following expressions:
`(x^2 - x + 1)^2 - (x^2 + x + 1)^2`
Simplify of the following:
(x+3)3 + (x−3)3
Simplify of the following:
(2x − 5y)3 − (2x + 5y)3
Find the following product:
(4x − 3y + 2z) (16x2 + 9y2 + 4z2 + 12xy + 6yz − 8zx)
If a + b + c = 0, then write the value of \[\frac{a^2}{bc} + \frac{b^2}{ca} + \frac{c^2}{ab}\]
If a - `1/a`= 8 and a ≠ 0 find :
(i) `a + 1/a (ii) a^2 - 1/a^2`
Use the direct method to evaluate the following products:
(x + 8)(x + 3)
If x + y + z = p and xy + yz + zx = q; find x2 + y2 + z2.
If `x + (1)/x = "p", x - (1)/x = "q"`; find the relation between p and q.
