Math, asked by sk997934, 10 months ago

The rationalising factor for the denominator of the expression ____1___ is
2√5-7√3

Answers

Answered by Christ777
0

Answer:

 -2\sqrt{5}  -  7\sqrt{3}    

        127

Step-by-step explanation:

DEAR STUDENT,

===================================================================

=        1        

 2\sqrt{5}-7\sqrt{3}

=        1          ×   2\sqrt{5}+7\sqrt{3}  

  2\sqrt{5}-7\sqrt{3}      2\sqrt{5}+7\sqrt{3}\\

=   2\sqrt{5}+7\sqrt{3}    

  (2\sqrt{5} ) ^{2} - (7\sqrt{3})^{2}                        {∵ (a+b)(a-b)=a^{2} -b^{2}}

=  2\sqrt{5}+7\sqrt{3}    

    4(5) - 49(3)

=  2\sqrt{5}+7\sqrt{3}    

      20 - 147

=  2\sqrt{5}+7\sqrt{3}    

       - 127

= -(2\sqrt{5}+7\sqrt{3})  

          127

=  -2\sqrt{5}  -  7\sqrt{3}                    ANSWER

          127

=================================================================

THANKS

MARK AS BRAINLIEST

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