Current Attempt in Progress

For the following three vectors, what is $2*vec(C)*(2$vec$(A)$vec$(B))?$

vec$(A)=2\mathrm{.}00$hat$(i)+2\mathrm{.}00$widehat$(j)-4\mathrm{.}00$hat$(k)$

vec$(B)=-3\mathrm{.}00$hat$(i)+3\mathrm{.}00$widehat$(j)+4\mathrm{.}00$hat$(k)$

vec$(C)=7\mathrm{.}00$hat$(i)-8\mathrm{.}00$widehat$(j)$

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