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The quadratic equation 2x^2 + bx + 82 has a double root. Find all possible values of b.

 Jan 18, 2022
 #1
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In my answer, I will assume the discriminant in the quadratic formula is 0. 

The way to solve is:

b^2-4ac=0

b^2=4ac

b^2=4*2*82

b=+- sqrt(656)

b=+- 4sqrt(41)

 Jan 18, 2022

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