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Question

Solve : (3+4i)(4+5i)(4+3i)(6+7i)

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Solution

(3+4i)(4+5i)(4+3i)(6+7i)=12+15i+16i+20i224+28i+18i+21i2=12+31i2024+46i21(i2=1)=31i846i3×46i+346i+3=11i+5885

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