Advertisements
Advertisements
Question
Using suitable identities, evaluate the following.
(98)2
Sum
Solution
We have,
(98)2 = (100 – 2)2
= (100)2 + (2)2 – 2 × 100 × 2 ...[Using the identity, (a – b)2 = a2 + b2 – 2ab]
= 10000 + 4 – 400
= 9604
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
Show that (3x + 7)2 − 84x = (3x − 7)2
Simplify the following using the formula: (a − b)(a + b) = a2 − b2: (82)2 − (18)2
Simplify the following using the formula: (a − b)(a + b) = a2 − b2: 95 × 105
Find the value of x, if 14x = (47)2 − (33)2.
Find the following product: (x − 11) (x + 4)
Find the following product: \[\left( x + \frac{4}{3} \right)\left( x + \frac{3}{4} \right)\]
Find the following product: (3x2 − 4xy) (3x2 − 3xy)
2p is the factor of 8pq
Multiply the following:
(3x2 + 4x – 8), (2x2 – 4x + 3)
Simplify:
`(7/9 a + 9/7 b)^2 - ab`
