bb140 bb140 25-10-2020 Mathematics contestada which of the following is equal to (1/a+a)^2 - (1/a-a)^2 ? A) 0 B) 4 C) 1/a^2 - a^2 D) 2/a^2 - 2a^2 E) 1/a^2 - 4-a^2