October 2021 0 3 Report
ДОПОМОЖІТЬ РОЗВ"ЯЗАТИ !!!! !!! Вектори а і b утворюють кут 120 градусів. Довжина вектора а = 3 , а довжина вектора b =2. Обчислити (3а-2b)(a+2b) .

Над векторами має бути стрілка (напрям).
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