Question

Show that the equation 2x^3 + 3x^2 + 6x + 1 = 0
has exactly one real root.

Answer 1

thus it should cut x axis once if any since cubic its roots cant be alll complex asthey only occur in conjugate pair and thus 1 real root must be there only and it will be negative since if we replace x in eq.by positive nos we will never get zero so see i gave you more than thwhat you wanted bro.................