Question

simplify the following expressions
1) (5+√5)(5-√5)
2) (√3+√7)2
3) (√11-√7)(√11+√7)​

Answer 1

HERE IS UR ANSWER DEAR

1) (5+√5)(5-√5) = (5)²-(√5)²= 25-5 = 20

it is by (a+b)(a-b) =a²-b²

2) (√3+√7)2 = 2√3 +2√7

3)(√11-√7)(√11+√7) = (√11)²-(√7)²=11-7=4

it is by (a+b)(a-b) =a²-b²