You can put this solution on YOUR website! (-8c^2+4c+2)-(6c^2+2)
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Distribute the negative to terms inside the right parenthesis:
-8c^2+4c+2-6c^2-2
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Group like-terms:
(-8c^2-6c^2)+4c+(2-2)
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Combine:
(-14c^2)+4c+(0)
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-14c^2+4c
Or, factoring out 2c:
2c(-7c + 2)