Advertisements
Advertisements
प्रश्न
The value of 2492 – 2482 is ______.
पर्याय
12
477
487
497
Advertisements
उत्तर
The value of 2492 – 2482 is 497.
Explanation:
Consider the expression:
2492 – 2482
Use the identity: a2 – b2 = (a + b)(a – b)
2492 – 2482 = (249 + 248)(249 – 248)
= 497 × 1
= 497
APPEARS IN
संबंधित प्रश्न
Factorise the following using appropriate identity:
9x2 + 6xy + y2
Expand the following, using suitable identity:
(3a – 7b – c)2
Expand the following, using suitable identity:
`[1/4a-1/2b+1]^2`
Write the following cube in expanded form:
`[3/2x+1]^3`
Factorise the following:
8a3 + b3 + 12a2b + 6ab2
Evaluate the following using identities:
(399)2
Simplify the following products:
`(x^3 - 3x^2 - x)(x^2 - 3x + 1)`
Evaluate the following:
(98)3
Simplify of the following:
If a + b + c = 0, then \[\frac{a^2}{bc} + \frac{b^2}{ca} + \frac{c^2}{ab} =\]
Find the square of : 3a - 4b
Evalute : `( 7/8x + 4/5y)^2`
Evaluate: `(3"x"+1/2)(2"x"+1/3)`
Evaluate: (5xy − 7) (7xy + 9)
Expand the following:
(x - 5) (x - 4)
Expand the following:
(2x - 5) (2x + 5) (2x- 3)
If `"a" + 1/"a" = 6;`find `"a"^2 - 1/"a"^2`
Factorise the following:
4x2 + 20x + 25
Find the value of x3 + y3 – 12xy + 64, when x + y = – 4
