B. 3+7i / 3+7i
ExplanationStep 1: In complex subtraction change signs carefully. Step 2: 6-3=3 and 2i-(-5i)=7i. Step 3: Distribute the minus sign when opening brackets.
Step 1: Complex subtraction में signs ध्यान से बदलें। Step 2: 6-3=3 और 2i-(-5i)=7i। Step 3: Bracket खोलते समय minus sign distribute करें।
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