Question

Please answer this question It's very urgent..

Answer 1

Hi ,

LHS = (7+3√5)/(3+√5) -(7-3√5)/(3-√5)

=[(7+3√5)(3-√5)-(7-3√5)(3+√5)]/[(3+√5)(3-√5)]

=[21-7√5+9√5-15-21-7√5+9√5+15]/[3²-(√5)²]

= [-14√5+18√5 ]/( 9 - 5 )

= [ 4√5 ]/4

= √5

= 0 + 1√5

= RHS

= a + b√5

compare LHS and RHS,

a = 0 , b = 1

I hope this helps you.

: )

Answer 2

hope it helps you....