Question

$0.5(a + b + c) - 0.5(a - b + c) - 0.5(a + b - c)$
очееень и очеееень срочно​

Answer 1

0,5(a + b + c) – 0,5(a – b + c) – 0,5(a + b – c) = 0,5(a + b + c – a + b – c – a – b + c) = 0,5(– a + b + c) = –0,5a + 0,5b + 0,5c