Răspunsuri

2014-07-31T10:13:12+03:00
(2 + √3 )^2
formula generale este
(a+b)^2=a^2+2ab+^2

Deci, aplicata, va fi
2^2+2*2*rad3+(rad3)^2=
4+4rad3+3=
7+4rad3
1 4 1
2014-07-31T10:14:40+03:00
(2+√3)²= 2²`+2x2√3+√3²
=4`+4√3+3
7+4√3