(1/2+2)^2+ 1/2(4+7 1/2)

Question

(1/2+2)^2+ 1/2(4+7 1/2)

Answer 1

Решение
(1/2+2)^2+ 1/2(4+7 1/2) = 2,5² + (1/2)*(11,5) =
= 6,25 +  (1/2)*(11,5) = 6,25 + 5,75 = 12