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How is everyone this November morning? I just need some help today with some polynomial problems that are tricky for me.

 

what are the roots/zeros of 2x^2+4x+7?

 

(Hint: this one will not factor, so you will have to use something else…)

 

Please and thank you! 0^>

 Nov 14, 2018
 #1
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If the polynomial (quadratic) will not factor, then use the Quadratic formula

\(x = {-b \pm \sqrt{b^2-4ac} \over 2a}\)

We will have to assume  2x^2+4x+7 = 0       SInce you are looking for roots

For this    a = 2 b = 4  c = 7

 

-4 +-sqrt(-40)    /   4     =     -1 +-  1/2 i sqrt (10)   

 Nov 14, 2018
 #2
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Deleted.

 Nov 14, 2018
edited by Guest  Nov 14, 2018
edited by Guest  Nov 14, 2018

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