Advertisements
Advertisements
Question
Using suitable identities, evaluate the following.
(98)2
Evaluate
Advertisements
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
Simplify the following using the formula: (a − b)(a + b) = a2 − b2: (79)2 − (69)2
Evaluate the following: 102 × 106
Expand the following:
(−p + 2q + 3r)2
Multiply the following:
(3x2 + 4x – 8), (2x2 – 4x + 3)
Simplify:
(b2 – 49)(b + 7) + 343
Expand the following, using suitable identities.
`(4/5a + 5/4b)^2`
Expand the following, using suitable identities.
(x + 3)(x + 7)
Using suitable identities, evaluate the following.
(103)2
Using suitable identities, evaluate the following.
(995)2
Perform the following division:
(x3y3 + x2y3 – xy4 + xy) ÷ xy
