Question

(2+√3)²rezolva detailat

Answer 1

(2+√3)²=2² +2*2*√3+(√3)²=
=4+4√3+3=
=4+3+4√3=
=7+4√3

Answer 2

$\boxed{\boxed{\bold{(a+b)^2=a^2+2\cdot a \cdot b+b^2}}} \\ \\ \\ (2+ \sqrt{3} )^2=2^2+2\cdot2\cdot \sqrt{3} + (\sqrt{3} )^2 \\ =4+4 \sqrt{3} +3\\7+4 \sqrt{3}$