(a^2+b^2):(a^2-b^2)=(ac+bd):(ac-bd)
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(a^2+b^2):(a^2-b^2)=(AC+bd):(ac-bd)
(a^2+b^2)×(ac-bd)=(a^2-b^2)×(AC+bd)
a^2(ac-bd)+b^2(ac-bd)=a^2(AC+bd)-b^2(AC+bd)
a^3c-a^2bd+b^2ac-b^3d=a^3c+a^2bd-b^2ac+b^3d
manishankar75:
hiii
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