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Vectors – Calculate scalar multiplication – Exercise 4486

Exercise

Calculate the multiplication

(5\vec{a}+3\vec{b})\cdot (2\vec{a}-\vec{b})

Given that

|\vec{a}|=2,|\vec{b}|=3,\vec{a}\bot\vec{b}

Final Answer

(5\vec{a}+3\vec{b})\cdot (2\vec{a}-\vec{b})=13

Solution

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