Question

If a=(√2 - √5 ÷ √2 + √5) and b=(√2 + √5 ÷
√2 - √5) then find the value of (a+b)^3​

Answer 1

find the value a =7-2√10

find the value b =7+2√10

(a+b)^3 =(7-2√10+7+2√10)^3

=(14)^3

=2744

Answer 2

Find the value of A = 7-2√10

Find the value of B= 7+2√10

( a+b )^3= ( 7-2 √10+ 7+2√10 )^3

= ( 14 )^3

= 2744.....ans