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Which expression is equivalent to 2x²+(4x-6x²)+9-(6x+3)

User MykelXIII
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2x²+(4x-6x²)+9-(6x+3)
2x²+4x-6x²+9-6x-3
2x²-6x²+4x-6x+9-3
-4x²-2x+6
User Wiktor Zychla
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