Question

if a=3+√5÷2 then find the value of a² + 1÷ a²

Answer 1

Answer:

By multiplying numerator and denominator by ( 7 - 3√5 ). 1 / a² = 2 ( 7 - 3√5 ) / ( 7 + 3√5 ) ( 7 - 3√5 ). = ( 7 - 3√5 ) / 2. = 7.

Answer 2

Answer:

( 7 + 3√5 ) / 2. By multiplying numerator and denominator by ( 7 - 3√5 ). 1 / a² = 2 ( 7 - 3√5 ) / ( 7 + 3√5 ) ( 7 - 3√5 ).