CBSE Class 8 Answered
Find the square of the number 82 using the property (a + b)2 = a2 + b2 + 2ab.
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
Expert Answer
822 = (80 + 2)2
In the property (a + b)2 = a2 + b2 + 2ab, put a = 80 and b = 2, we get:
(80 + 2)2 = 802 + 22 + 2 x 80 x 2
= 6400 + 4 + 320
= 6724
Answered by | 04 Jun, 2014, 03:23: PM
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