Question

calcule o valor da expressão 12 [(√2)^-2-(√3)^-2].

Answer 1

12 [(√2)^-2-(√3)^-2]

<=> 12 [ (1/√2)^2-(1/√3)^2]

<=> 12 [1/4-1/9]

<=> 12 [5/36] = 5/3