If x\(^3\)- 12x - 16 = 0 has x = -2 as a solution, then the equation has
 

  • A x = -4 as a solution also
  • B 3 roots all different
  • C 3 roots with two equal and the third different
  • D 3 roots all equal
  • E only one root
jamb 1979mathematics

The correct answer is B. 3 roots all different

The above is a cubic equation and a cubic equation has exactly three roots, but these roots can be real or complex, and they can be distinct or repeated.

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