When \(x=-1\), what is the value of \(4x^3-2x^2\) ?
\(-8\)
\(-6\)
\(-2\)
\(2\)
\(6\)
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$$ 4x^3-2x^2 $$ $$ 4(-1)^3-2(-1)^2 $$ $$ = 4(-1)-2(1) $$ $$ = -4-2 $$ $$ = \boxed{-6} $$