Question

(3+√5)(2+√5)²
Maths chapter 1 number system​

Answer 1

Step-by-step explanation:

(3+√5)(2+√5)²

=(3+√5)(4+4√5+5)

=12+12√5+15+4√5+20+5√5

=47+21√5

Answer 2

Step-by-step explanation:

$= (3 + \sqrt{5} )(4 + 4 \sqrt{5} + 5) \\ = 12 + 12 \sqrt{5} + 15 + 4 \sqrt{5} + 20 + 5 \sqrt{5} \\ = 47 + 21 \sqrt{5}$

hope it's helpful.