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If A B C D E F is a regular hexagon, the...

If `A B C D E F` is a regular hexagon, them ` vec A D+ vec E B+ vec F C` equals `2 vec A B` b. ` vec0` c. `3 vec A B` d. `4 vec A B`

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Verified by Experts

`3x-7y^2+3xyz=3(2)-7(-4)^2+3(2)(-4)(1)`
`=6-7xx16-6xx4`
`=6-112-24`
`=6-136`
`=130`
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