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ICSE Class 8 Answered

Using identity (a+b)(a-b)=a2 - b2 , evaluate the following:- 34/5x46/5
Asked by swarup.ghosh21 | 01 May, 2023, 10:11: AM
answered-by-expert Expert Answer
open parentheses 34 over 5 close parentheses cross times open parentheses 46 over 5 close parentheses equals open parentheses fraction numerator 40 minus 6 over denominator 5 end fraction close parentheses cross times open parentheses fraction numerator 40 plus 6 over denominator 5 end fraction close parentheses equals open parentheses 40 over 5 minus 6 over 5 close parentheses cross times open parentheses 40 over 5 plus 6 over 5 close parentheses equals open parentheses 8 minus 6 over 5 close parentheses cross times open parentheses 8 plus 6 over 5 close parentheses equals open parentheses 8 close parentheses squared minus open parentheses 6 over 5 close parentheses squared equals 64 minus 36 over 25 equals fraction numerator 1600 minus 36 over denominator 25 end fraction equals 1564 over 25 equals 62 14 over 25
Answered by Rashmi Khot | 02 May, 2023, 10:33: AM

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