Question

differentiation (2x^2-3x-1)cos x​

Answer 1

cosx.d/dx(2x^2-3x-1)+(2x^2-3x-1).d/dx(cosx)

cosx.(4x-3)+(2x^2-3x-1).(-sinx)

cosx.(4x-3)-sinx.(2x^2-3x-1)