Find the indicated quantity, given $\mathbf{u}=\langle-5,-6\rangle, \mathbf{v}=\langle-6,-1\rangle$ Step 2 of 4 : Find $4 \mathbf{u} \cdot \mathbf{v}$.
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Answer

$\boxed{4 \mathbf{u} \cdot \mathbf{v} = 144}$

Steps

Step 1 ：$\mathbf{u} \cdot \mathbf{v} = (-5)*(-6) + (-6)*(-1)$

Step 2 ：$\mathbf{u} \cdot \mathbf{v} = 30 + 6$

Step 3 ：$\mathbf{u} \cdot \mathbf{v} = 36$

Step 4 ：$4 \mathbf{u} \cdot \mathbf{v} = 4*36$

Step 5 ：$\boxed{4 \mathbf{u} \cdot \mathbf{v} = 144}$