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If (a+ib)(c+id)(c+if)(g+ih) = A + iB, then show that (a2+b2)(c2+d2)(c2+f2)(g2+h2)=A2+B2

Answer» If (a+ib)(c+id)(c+if)(g+ih) = A + iB, then show that (a2+b2)(c2+d2)(c2+f2)(g2+h2)=A2+B2


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