Question

(5-root6)(5+root6)=a-broot6

Answer 1

Atq,
$(5 - \sqrt{6} )(5 + \sqrt{6} ) = a - b \sqrt{6}$
${5}^{2} - { \sqrt{6} }^{2} = a - b \sqrt{6}$
$25 - 6 = a - b \sqrt{6}$
a = 25
$b = \sqrt{6}$