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Subtract. (5r2+5r+9)–(3r+2)

User Cristian V
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(5r2+5r+9)–(3r+2)

You have a minus before the parentesis, so you change the sign of the terms in the parentesis

5r^2+5r+9-3r-2

5r^2+(5-3)r+7

5r^2+2r+7
User Diogok
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