Question

Qual a resposta da conta da foto?

Answer 1

$(2 \sqrt{3} +1)^{2} + (2 \sqrt{3} -1)^{2} -(2 \sqrt{3} +1).(2 \sqrt{3} -1)$

$(2 \sqrt{3} )^{2} +2. 2\sqrt{3} .1+ 1^{2} +(2 \sqrt{3} )^{2} -2. 2\sqrt{3} .1+ 1^{2} -[(2 \sqrt{3} )^{2} - 1^{2}]$

$12+4\sqrt{3}+ 1 +12 -4\sqrt{3}+ 1 -12 +1$

$12+ 1 + 1 +1$

$15$