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If a + b + c = 13, a^2 + b^2 + c^2 = 69,...

If `a + b + c = 13, a^2 + b^2 + c^2 = 69, " then find " ab + bc + ca`.

A

`-50`

B

50

C

69

D

75

Text Solution

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The correct Answer is:
B
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