Question

rationalise the following
a)

Answer 1

(4+3root5)/(4-3root5)     
=4+3root5/4-3root5  x 4+3root 5 / 4+3root 5
=(4+3root 5)^2 / 4^2  -(3root5)^2
16+24root5 +45 / -29
-(61+24root5) / 29

on comparing
 a= -61/29
b  root 5 = -24 root 5 /  29
therefore, b= -24/29

hope it helps you!!!!