Find \(\frac{d^2 y}{dx^2}\)-6 \(\frac{dy}{dx}\) if y=4x4+2x.

• A. \((4x^2+8x-1)\)
• B. \(12(4x^2+8x-1)\)
• C. –\(12(4x^2+8x-1)\)
• D. \(12(4x^2-8x-1)\)