ICSE Class 8 Answered

SIMPLIFY; (5+√7)/(5-√7) - (5-√7)/(5+√7) 

Asked by justjasonpong | 14 Nov, 2018, 07:31: PM

Expert Answer

begin mathsize 18px style fraction numerator 5 plus square root of 7 over denominator 5 minus square root of 7 end fraction minus fraction numerator begin display style 5 minus square root of 7 end style over denominator begin display style 5 plus square root of 7 end style end fraction rationalize fraction numerator begin display style 5 plus square root of 7 open parentheses 5 plus square root of 7 close parentheses end style over denominator begin display style 5 minus square root of 7 open parentheses 5 plus square root of 7 close parentheses end style end fraction minus fraction numerator begin display style 5 minus square root of 7 open parentheses 5 minus square root of 7 close parentheses end style over denominator begin display style 5 plus square root of 7 open parentheses 5 minus square root of 7 close parentheses end style end fraction equals fraction numerator begin display style open parentheses 5 plus square root of 7 close parentheses squared end style begin display style minus end style begin display style begin display style open parentheses 5 minus square root of 7 close parentheses end style squared end style over denominator 25 minus 49 end fraction expand space and space simplify end style

Answered by Arun | 15 Nov, 2018, 09:25: AM

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