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
Evaluate the following using identities:
`(a^2b - b^2a)^2`
if `x + 1/x = 11`, find the value of `x^2 + 1/x^2`
Simplify the following products:
`(x/2 - 2/5)(2/5 - x/2) - x^2 + 2x`
Write in the expanded form:
`(2 + x - 2y)^2`
Simplify (a + b + c)2 + (a - b + c)2
Simplify the expression:
`(x + y + z)^2 + (x + y/2 + 2/3)^2 - (x/2 + y/3 + z/4)^2`
Evaluate of the following:
(99)3
Find the following product:
(4x − 5y) (16x2 + 20xy + 25y2)
Find the following product:
(3x − 4y + 5z) (9x2 +16y2 + 25z2 + 12xy −15zx + 20yz)
Evaluate:
253 − 753 + 503
(x − y) (x + y) (x2 + y2) (x4 + y4) is equal to ______.
Use the direct method to evaluate the following products :
(3x – 2y) (2x + y)
Evaluate: (6 − 5xy) (6 + 5xy)
If a2 + b2 + c2 = 41 and a + b + c = 9; find ab + bc + ca.
Simplify:
(2x - 4y + 7)(2x + 4y + 7)
Evaluate the following :
7.16 x 7.16 + 2.16 x 7.16 + 2.16 x 2.16
Find the following product:
`(x/2 + 2y)(x^2/4 - xy + 4y^2)`
Find the following product:
(x2 – 1)(x4 + x2 + 1)
