Question

Solve:
1.(√5+√3)(√5-√3)
2.(√5+√7)²
3.6√15÷3√5​

Answer 1

Answer:

1.) using (a-b)(a+b)= a²-b²

(√5)²-(√3)²=5-3

2

2.)using (a+b)²=a²+b²+2ab

(√5)²+(√7)²+2(√5)(√7)

5+7+2√35

12+2√35

3.) 6√15/3√5

2√3