Question

rationalise the denominator 1/7+5√2

Answer 1

$\frac{1}{7 + 5 \sqrt{2} }$

By Rationalization,

⇒$\frac{1}{7 + 5 \sqrt{2} }$×$\frac{7 - 5 \sqrt{2} }{7 -5 \sqrt{2} }$

⇒$\frac{7 - 5 \sqrt{2} }{(7)^2 - ( 5\sqrt{2})^2 }$

⇒$\frac{7 - 5 \sqrt{2} }{49 - 50}$

⇒$\frac{7 - 5 \sqrt{2} }{-1}$

⇒$\frac{-1( -7 + 5 \sqrt{2}) }{-1}$

⇒-7 + 5√2




i hope this will help you


-by ABHAY

Answer 2

Answer:

hope this helps you mate....