If x + y +z = 9 and xy + yz + zx = 23, the value of (x + y + y) - 3.xyz)? a. 108
b. 207
c. 669
d. 729
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If x + y +z = 9 and xy + yz + zx = 23, the value of (x + y + y) - 3.xyz)? a. 108
b. 207
c. 669
d. 729
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