Answers

  • Brainly User
2016-06-25T23:03:55+08:00
NO.  The solution are not the same.

To justify, solve quadratic equation by extracting the roots:

w² = 49

 \sqrt{w ^{2} } = \sqrt{49}

w = +7, -7

While:

w² + 49 = 0

w² = -49

 \sqrt{w ^{2} } = \sqrt{-49}

w =  }  \sqrt{-49}  or   i \sqrt{49} , an imaginary number


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