Concept:Differentiate the product by first expanding the brackets, then substitute x=−1 into the derivative.Explanation:Expand the function:y=2x2(2x−1)=4x3−2x2Differentiate term by term:dxdy=12x2−4xSubstitute x=−1:dxdy=12(−1)2−4(−1)=12(1)+4=12+4=16Answer:The derivative at x=−1 is 16, which is option B.