If \[\mathbf{a}+\mathbf{b}+\mathbf{c}=\mathbf{12}\]and a2 + b2 + c2 = 50, then the value of \[\mathbf{ab}+\mathbf{be}+\mathbf{ca},\]is

If \[\mathbf{a}+\mathbf{b}+\mathbf{c}=\mathbf{12}\]and a2 + b2 + c2 =

1.	If \[\mathbf{a}+\mathbf{b}+\mathbf{c}=\mathbf{12}\]and a2 + b2 + c2 = 50, then the value of \[\mathbf{ab}+\mathbf{be}+\mathbf{ca},\]is
A.	44
B.	22
C.	23
D.	47
Answer» E.

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If \[\mathbf{a}+\mathbf{b}+\mathbf{c}=\mathbf{12}\]and a2 + b2 + c2 = 50, then the value of \[\mathbf{ab}+\mathbf{be}+\mathbf{ca},\]is

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