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NDA2019MathematicsQuadratic EquationActual

How many real roots does the equation x^3+3|x|+2=0 have?

Options

  1. AZero
  2. BOne
  3. CTwo
  4. DFour

Correct answer

A. Zero

Step-by-step solution

aligned & x^2+3|x|+2=0 & =(|x|)^2+3|x|+2=0 & (|x|+1)(|x|+2)=0 & |x|=-1,-2 & No real roots exist. aligned

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