Question

simplify (2+√5)^2=?+4√5​

Answer 1

Answer:

(2+√5)^2 =a^2+b^2+2.a.b

=4+5+2×2×√5

=9+4√5

Answer 2

Step-by-step explanation:

(2+√5)^2=?+4√5

(4+5)=?+4√5

9-4√5=?