Four numbers whose sum is 40 and sum of their squares is 480. What are the four numbers?

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answerhappygod
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Four numbers whose sum is 40 and sum of their squares is 480. What are the four numbers?

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a) 4, 8, 12, and -16
b) 4, 8, 12, and 16
c) -4, 8, 12, and 16
d) 4, -8, 12, and 16
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