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5m²-8mn+2n²
=8m²-8mn+2n²-3m²
=2(4m²-4mn+n²)-3m²
=2(2m-n)²-3m²
=2[(2m-n)²-3m²/2]
=2[(2m-n)²-6m²/4]
=2(2m-n-√6m/2)(2m-n+√6m/2)
=8m²-8mn+2n²-3m²
=2(4m²-4mn+n²)-3m²
=2(2m-n)²-3m²
=2[(2m-n)²-3m²/2]
=2[(2m-n)²-6m²/4]
=2(2m-n-√6m/2)(2m-n+√6m/2)
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