if mod(z1)=1 mod(z2)=2 mod(z3)=3 and mod(9z1z2+4z1z3+z2z3)=12 find the value of mod(z1+z2+z3)

i know mod(z1+z2+z3)<=mod(z1)+mod(z2)+mod(z3) but how to do this

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- March 24th 2011, 08:42 AMprasumcomplex problem
if mod(z1)=1 mod(z2)=2 mod(z3)=3 and mod(9z1z2+4z1z3+z2z3)=12 find the value of mod(z1+z2+z3)

i know mod(z1+z2+z3)<=mod(z1)+mod(z2)+mod(z3) but how to do this - March 24th 2011, 09:43 AMOpalg