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MATH / Let a, b, and c be vectors such that ‖a‖=5, ‖b‖=7, and ‖c‖=9, and a+b+c=0.Find a⋅b+a⋅c+b⋅c. · Discussion

Discussing Let a, b, and c be vectors such that ‖a‖=5, ‖b‖=7, and ‖c‖=9, and a+b+c=0.Find a⋅b+a⋅c+b⋅c. · MATH

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