Question

expand the following
2+root 5 square ​

Answer 1

Answer:

Hey Mate!!

(2 + √5)^2

= 2^2 + 2(2)(√5) + (√5)^2

= 4 + 4√5 + 5

= 9 + 4√5

Answer 2

$(2+\sqrt{5} )^{2} \\ \\(2)^{2} +(\sqrt{5} )^{2} +2(2)(\sqrt{5} ) \\ \\\red{4 +5+4\sqrt{5}}$