Advertisements
Advertisements
प्रश्न
Evaluate the following using identities:
(0.98)2
Advertisements
उत्तर
We have
(0.98)2 = [1 - 0.02]2
= (1)2 + (0.02)2 - 2 x 1 x 0.02
= 1 + 0.0004 - 0.04 [∵ a = 1, b = 0.02]
= 1.0004 - 0.04
= 0.9604
∴ (0.98)2 = 0.9604
APPEARS IN
संबंधित प्रश्न
Factorise the following using appropriate identity:
`x^2 - y^2/100`
Evaluate the following using suitable identity:
(102)3
What are the possible expressions for the dimensions of the cuboids whose volume is given below?
| Volume : 3x2 – 12x |
If `x^2 + 1/x^2 = 66`, find the value of `x - 1/x`
Simplify the following products:
`(x^3 - 3x^2 - x)(x^2 - 3x + 1)`
Write in the expanded form:
`(2 + x - 2y)^2`
If a + b + c = 9 and ab + bc + ca = 23, find the value of a2 + b2 + c2.
If \[x - \frac{1}{x} = \frac{1}{2}\],then write the value of \[4 x^2 + \frac{4}{x^2}\]
If a + b + c = 0, then \[\frac{a^2}{bc} + \frac{b^2}{ca} + \frac{c^2}{ab} =\]
If a + b + c = 9 and ab + bc + ca =23, then a3 + b3 + c3 − 3abc =
Expand the following:
(a + 4) (a + 7)
If m - n = 0.9 and mn = 0.36, find:
m + n
If `"a" + (1)/"a" = 2`, then show that `"a"^2 + (1)/"a"^2 = "a"^3 + (1)/"a"^3 = "a"^4 + (1)/"a"^4`
The value of 2492 – 2482 is ______.
Using suitable identity, evaluate the following:
1033
Factorise the following:
`(2x + 1/3)^2 - (x - 1/2)^2`
Find the value of x3 + y3 – 12xy + 64, when x + y = – 4
Find the value of x3 – 8y3 – 36xy – 216, when x = 2y + 6
