Question

Find the values of a and b respectively if √7 - 1/√7 + 1 - √7 + 1/ √7 - 1 = a + b√7 . 

Answer 1

here rt(7) and -rt(7)will be cancelled and -1/rt(7) and +1/rt97) cancelled then 1 and -1 will be cancelled
then we get
a+brt(7)=0
a=-brt(7)
solving this we get
a=-rt(7)
b=1