Prove that `|axxb^2 =a^2b^2 - (a.b)^2`

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Prove that `|axxb^2 =a^2b^2 - (a.b)^2`
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Prove that `|axxb^2 0:02:58

Prove that `|axxb^2 =a^2b^2 - (a.b)^2`

Prove that `|axxb^2 0:02:57

Prove that `|axxb^2 =a^2b^2 - (a.b)^2`

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