can u explain the logic behind this step becoming the second.... unable to understand....pls.....

Asked by pksunilnair | 5th Oct, 2017, 11:24: AM

Expert Answer:

begin mathsize 16px style straight f open parentheses fraction numerator 4 straight y minus 3 over denominator 4 minus 3 straight y end fraction close parentheses equals fraction numerator 4 open parentheses begin display style fraction numerator 4 straight y minus 3 over denominator 4 minus 3 straight y end fraction end style close parentheses plus 3 over denominator 3 open parentheses fraction numerator 4 straight y minus 3 over denominator 4 minus 3 straight y end fraction close parentheses plus 4 end fraction
space space space space space space space space space space space space space space space space space space space equals fraction numerator begin display style fraction numerator 4 open parentheses 4 straight y minus 3 close parentheses plus 3 open parentheses 4 minus 3 straight y close parentheses over denominator up diagonal strike 4 minus 3 straight y end strike end fraction end style over denominator begin display style fraction numerator 3 open parentheses 4 straight y minus 3 close parentheses plus 4 open parentheses 4 minus 3 straight y close parentheses over denominator up diagonal strike 4 minus 3 straight y end strike end fraction end style end fraction space space space space space space space Taking space LCM space on space the space numerator space and space denominator
space space space space space space space space space space space space space space space space space space space equals fraction numerator 4 open parentheses 4 straight y minus 3 close parentheses plus 3 open parentheses 4 minus 3 straight y close parentheses over denominator 3 open parentheses 4 straight y minus 3 close parentheses plus 4 open parentheses 4 minus 3 straight y close parentheses end fraction
space space space space space space space space space space space space space space space space space space space equals space fraction numerator 16 straight y space up diagonal strike negative space 12 end strike space plus up diagonal strike space 12 end strike space minus space 9 straight y over denominator up diagonal strike 12 straight y end strike space minus space 9 space plus space 16 space minus space up diagonal strike 12 straight y end strike end fraction space
space space space space space space space space space space space space space space space space space space space equals fraction numerator 7 straight y over denominator 7 end fraction equals straight y end style

Answered by Sneha shidid | 27th Dec, 2017, 05:39: PM