-a^2+(-4a+3a^2)-(5a^2+2a-1),其中a=-2/3 化简求值

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-a^2+(-4a+3a^2)-(5a^2+2a-1),其中a=-2/3化简求值-a^2+(-4a+3a^2)-(5a^2+2a-1),其中a=-2/3化简求值-a^2+(-4a+3a^2)-(5a^

-a^2+(-4a+3a^2)-(5a^2+2a-1),其中a=-2/3 化简求值
-a^2+(-4a+3a^2)-(5a^2+2a-1),其中a=-2/3 化简求值

-a^2+(-4a+3a^2)-(5a^2+2a-1),其中a=-2/3 化简求值
-a^2+(-4a+3a^2)-(5a^2+2a-1)
=-a^2-4a+3a^2-5a^2-2a+1
=-3a²-6a+1
=-3×4/9+6×2/3+1
=-4/3+4+1
=-4/3+5
=11/3

回答的那个就对