Question

(2a+0.5)в квадрате - (0.5-2a)в квадрате

Answer 1

(0,5+2а)^2-(0,5-2а)^2=(0,5+2а-0,5+2а)×(0,5+2а+0,5-2а) =4а×1=4а

Answer 2

(2a+0,5)^2 – (0,5–2a)^2 = 4a^2+2a+0,25–0.25+2a–4a^ = 4a