Advertisements
Advertisements
Question
Using suitable identities, evaluate the following.
(35.4)2 – (14.6)2
Evaluate
Advertisements
Solution
We have,
(35.4)2 – (14.6)2 = (35.4 + 14.6)(35.4 – 14.6) ...[Using the identity, (a + b)(a – b) = a2 – b2]
= 50 × 20.8
= 1040
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: (3x + 4y)(3x - 4y)
Factorise the following expressions
m2 + m – 72
Evaluate the following, using suitable identity
990 × 1010
(5 + 20)(–20 – 5) = ?
Find the value of (x – y)(x + y)(x2 + y2)
a2 – b2 = (a + b) ______.
The value of (a + 1)(a – 1)(a2 + 1) is a4 – 1.
Using suitable identities, evaluate the following.
(9.7)2 – (0.3)2
Factorise the following using the identity a2 – b2 = (a + b)(a – b).
p5 – 16p
Find the value of `(6.25 xx 6.25 - 1.75 xx 1.75)/(4.5)`
