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KCET2012MathematicsQuadratic Equation

If , and are the roots of the equation x³+4 x+2=0 , then ³+ ³+ ³ is equal to

Options

  1. A2
  2. B6
  3. C-2
  4. D-6

Correct answer

D. -6

Step-by-step solution

Given, x³+4 x+2=0 =0, = 4 1 =4, = -2 1 =-2 =0 ³+ ³+ ³=3 =3(-2)=-6

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