Question

solve using identities. (3+√5)^2​

Answer 1

Answer:

Step-by-step explanation:

(a+b)²=a²+2ab+b²

=3²+2*3*√5 +√5²

=9+6√5 +5

=14+6√5

Answer 2

Using identity (a+b)^2 = a^2+b^2+2ab

Given: (3+√5)^2

= 3^2+(√5)^2+(2*3*√5)

9+5+6√5

= 27.41

So ( 3+√5) = 27.41