Vectors – Calculation of scalar multiplication between vectors in vector presentation – Exercise 3584

Exercise

Given

$$\vec{a}=3\vec{i}+\vec{j}-2\vec{k}$$

$$\vec{b}=\vec{i}-4\vec{j}-5\vec{k}$$

Calculate the following

$$\vec{a}\cdot\vec{b}$$

$$\vec{a}\cdot\vec{b}=9$$