Вправи 301 - 400 » 321

321. Спростіть вираз: 1) x–3 • x–10 = x–3+(–10) = x–13; 2) x3 • x–10 = x3+(–10) = x–7; 3) x–3 • x10 = x–3+10 = x7; 4) x3 • x10 = x3+10 = x13; 5) x0 • x • x–1 = 1 • x1–1 = x0 = 1; 6) x–32 • x–65 • x42 • x75 = x–32+(–65)+42+75 = x20.