If H be a subgroup of G, such that x^2€H all x€G, Prove that H is Normal in G|Group Theory

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If H be a subgroup of G, such that x^2€H all x€G, Prove that H is Normal in G|Group Theory, |#bengaliexplanation #mathematics #cbse #jam #csirnet #gate.
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If H be a subgroup of G, such that x^2€H all x€G, Prove that H is Normal in G|Group Theory

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