CBSE Class 8 Answered
using identities (formulae),evaluate:78×82
Asked by sahibsinghsekhon000 | 06 Jan, 2021, 08:33: AM
Expert Answer
Using the identity (a - b)(a + b) =a2 - b2
78 x 82 = (80 - 2) x (80 + 2) = 802 - 22 = 6400 - 4 = 6396
Answered by Renu Varma | 07 Jan, 2021, 10:48: AM
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