−3a3 + 12(3a2 − 2a3 − 3a) − 2a , for a = -2

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1 Answer

Simplify:

-3a³+36a²-24a³-36a-2a=-27a³+36a²-38a.

Put a=-2:

(-27)(-8)+36(4)-38(-2)=216+144+76=436.

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