5+9+2 = 146
4+9+8 = 280
6+3 +9 = 198.
9+ 7 + 5 = ?
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Answer:
286
Step-by-step explanation:
a*b*c = 2×(a*b + b*c + a*c)
So 9+7+5 = 2×(9*7 + 7*5 + 9*5)=286
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