If a + b + c = 12, a2 + b2 + c2 = 52, then what is ab + bc + ca equal to-

If a + b + c = 12, a2 + b2 + c2 = 52, then what is ab + bc + ca equal

1.	If a + b + c = 12, a² + b² + c² = 52, then what is ab + bc + ca equal to-
A.	124
B.	120
C.	46
D.	75
Answer» D. 75