Find the value of the given expression 6a^3 - 4a^2 + 1/8 for a = -1/2
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a=-1/2
6(-1/2)³-4(-1/2)²+1/8
6(-1/8)-4(1/4)+1/8
-6/8+1/8-1
-5/8-1
-5-8/8
-13/8
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