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Why Is this algebraic expression is different (x-y)² = x²-2xy+y² my question actually is about why x² has an (-) sign and why y² has a (+) sign |
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Answer» Why Is this algebraic expression is different (x-y)² = x²-2xy+y² my question actually is about why x² has an (-) sign and why y² has a (+) sign |
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