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Which polynomial represents the difference below 5x^2+9x+3-(x^2-3x)?

Which polynomial represents the difference below 5x^2+9x+3-(x^2-3x)?
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Which polynomial represents the difference below 5x^2+9x+3-(x^2-3x)?

User Geneve
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5x^2+9x+3-(x^2-3x)=5x^2+9x+3-x^2+3x\\\\=(5x^2-x^2)+(9x+3x)+3=4x^2+12x+3
User Spe
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