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Can some one help explain this

Can some one help explain this-example-1

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User Voutasaurus
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Answer:


4( {x}^(2) - 1) - ( {x}^(2) - 8x - 5)


4 {x}^(2) - 4 - {x}^(2) + 8x + 5


3 {x}^(2) + 8x + 1

User Ikamen
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