Question

qual a forma mais simples de escrever a expressão (√7+√5)² - (√7+√5) (√7-√5)?

Answer 1

$(\sqrt{7}+\sqrt{5})^{2}-(\sqrt{7}+\sqrt{5})(\sqrt{7}-\sqrt{5})$
$(\sqrt{7}+\sqrt{5})(\sqrt{7}+\sqrt{5})-(\sqrt{7}+\sqrt{5})(\sqrt{7}-\sqrt{5})$
$(7+\sqrt{35}+\sqrt{35}+5)-(7-\sqrt{35}+\sqrt{35}-5)$
$(12+2\sqrt{35})-(2)$
$12+2\sqrt{35}-2$
$10+2\sqrt{35}$