KEAM 2011 Math Paper

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Question : 82 of 120

Marks: +1, -0

Let z1=3+4i and z2=−1+2i. Then |z1+z2|2−2(|z1|2+|z2|2) is equal to

|z1−z2|2
−|z1−z2|2
|z1|2+|z2|2
|z1|2−|z2|2
|z1|2+|z2|2−2|z1||z2|

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