Advertisements
Advertisements
Question
Using suitable identities, evaluate the following.
(9.9)2
Evaluate
Advertisements
Solution
We have,
(9.9)2 = (10 – 0.1)2
= 102 + (0.1)2 – 2 × 10 × 0.1 ...[Using the identity, (a – b)2 = a2 + b2 – 2ab]
= 100 + 0.01 – 2
= 98.01
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
Expand (7m − 4)2
Expand: (5x - 4)2
Factorise the following using suitable identity
64x2 – 112xy + 49y2
(a – b) ______ = a2 – 2ab + b2
(a – b)2 + ______ = a2 – b2
(a – b)2 = a2 – b2
Factorise the following, using the identity a2 – 2ab + b2 = (a – b)2.
x2 – 10x + 25
Factorise the following, using the identity a2 – 2ab + b2 = (a – b)2.
`9y^2 - 4xy + (4x^2)/9`
Factorise the following.
p2 – 13p – 30
Factorise the following.
a2 – 16p – 80
