a * c = 3 * (-3) + (-4) * (-1) = -9 + 4 = -5
Ответ:
=3•(-3)+(-4)•(-1)=-5
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a * c = 3 * (-3) + (-4) * (-1) = -9 + 4 = -5
Ответ:
=3•(-3)+(-4)•(-1)=-5