find the modulus of (2+3i)^2/2+1
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1
(4+9i²+12i) /2+i
4-9+12i/2+i
5-12i/2+i
multiply by its conjugate u get urs answer
5-12ix2-i/4+1
5(2-i) -12(2-i) /5
10-5i-24+12i/5
-14+7i/5
7i-14/5 is the answer
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