Question

express √5-√3/√5+√3
when simplified reduces to a - b√ 15 then a+ b is equal to​

Answer 1

Answer:

rationalize

(√5-√3)(√5-√3)/{√5+√3)(√5-√3)}

(√5-√3)^2/(5-3)

(5+3-2√15)/2

(8-2√15)/2

4-√15=a-b√15

a=4 and b=1

a+b=4+1=5Ans