Respuesta :

To find the magnitude of a vector, there is a simple formula:

[tex]\begin{gathered} |v|=\sqrt[]{x^2+y^2} \\ |v|=\sqrt[]{(-4)^2+(2)^2} \\ |v|=\sqrt[]{16+4}=\sqrt[]{20}=2\sqrt[]{5} \\ \end{gathered}[/tex]

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