Ответ:
a · b = (a₁ * b₁) + (a₂ * b₂);a · b = (6 * 3) + (-5 * 4) = 18 - 20 = -2.
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Ответ:
a · b = (a₁ * b₁) + (a₂ * b₂);
a · b = (6 * 3) + (-5 * 4) = 18 - 20 = -2.