Advertisements
Advertisements
प्रश्न
Evaluate: `(2"a"+1/"2a")(2"a"-1/"2a")`
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
Factorise the following using appropriate identity:
`x^2 - y^2/100`
What are the possible expressions for the dimensions of the cuboids whose volume is given below?
| Volume : 12ky2 + 8ky – 20k |
Simplify the following: 175 x 175 x 2 x 175 x 25 x 25 x 25
Write in the expanded form: (-2x + 3y + 2z)2
Simplify the following expressions:
`(x^2 - x + 1)^2 - (x^2 + x + 1)^2`
Find the value of 64x3 − 125z3, if 4x − 5z = 16 and xz = 12.
If x = −2 and y = 1, by using an identity find the value of the following
If \[x^4 + \frac{1}{x^4} = 623\] then \[x + \frac{1}{x} =\]
Find the square of : 3a + 7b
Find the value of x3 + y3 – 12xy + 64, when x + y = – 4
