(4+2a^2-2a)-(3a^2-8a+7) find sum or difference
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Step-by-step explanation:
(4+2a^2-2a)-(3a^2-8a+7)
= 4 + 2a^2 - 2a - 3a^2+ 8a - 7
= 2a^2 - 3a^2+ 8a - 2a + 4 - 7
= - a^2 + 6a - 3
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