Respuesta :

Answer:

[tex]4i-j[/tex]

Explanation:

Here, we want to sum up the two vectors

Mathematically, we have that as follows:

[tex]\begin{gathered} \text{ 7i-8j-3i+7j} \\ 7i-3i-8j+7j \\ =\text{ 4i-j} \end{gathered}[/tex]