Advertisements
Advertisements
Question
Using suitable identities, evaluate the following.
(49)2
Sum
Solution
We have,
(49)2 = (50 – 1)2
= (50)2 + 12 – 2 × 50 × 1 ...[Using the identity, (a – b)2 = a2 + b2 – 2ab]
= 2500 + 1 – 100
= 2401
shaalaa.com
Is there an error in this question or solution?
Chapter 7: Algebraic Expression, Identities and Factorisation - Exercise [Page 233]
APPEARS IN
RELATED QUESTIONS
Find the following product: (3x − 4y) (2x − 4y)
Expand the following:
(−p + 2q + 3r)2
If 2x – 3y – 4z = 0, then find 8x3 – 27y3 – 64z3
2p is the factor of 8pq
Simplify:
`(7/9 a + 9/7 b)^2 - ab`
Simplify:
(1.5p + 1.2q)2 – (1.5p – 1.2q)2
Expand the following, using suitable identities.
`(4/5p + 5/3q)^2`
Expand the following, using suitable identities.
(2x – 5y)(2x – 5y)
Using suitable identities, evaluate the following.
(1005)2
Using suitable identities, evaluate the following.
47 × 53
