Ответ:
a*(b-4)-b*(a-3) = ab-4a-ab+3b = -4a+3b
при a = 2,5
b = - 1/3
-4 * 2,5 + 3 * (-1/3) = -10-1 = -11
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Ответ:
a*(b-4)-b*(a-3) = ab-4a-ab+3b = -4a+3b
при a = 2,5
b = - 1/3
-4 * 2,5 + 3 * (-1/3) = -10-1 = -11