[tex] \vec{a}=[x;\ y];\ \vec{b}=[u;\ v]\\\\\vec{a}\ \circ\ \vec{b}=xu+yv\\\\\vec{v}=[-3;-4]\\\\\vec{v}\ \circ\ \vec{v}=(-3)(-3)+(-4)(-4)=9+16=25 [/tex]
Answer: 25
