Răspuns :
[tex] 4 - 4 \sqrt{3} + 3 + 4 + 4 \sqrt{3} + 3 - 3 + 4[/tex]
[tex]15[/tex]
Coroniță plss
(2-√3)² + (2+√3)² - (√3 +2)(√3 - 2) =
= 4-4√3 + 3 + 4+4√3 + 3 - (3-4) =
= 14 - (-1) =
= 14 + 1 =
= 15
Formule:
(a+b)² = a²+2ab + b²
(a-b)² = a²-2ab+b²
(a-b)(a+b) = a²-b²