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Find all b for which  -x^2+6x+20=b will have no real roots​

 Mar 21, 2021
 #1
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if that equation no have real roots, then discriminant must be < 0.

\(6^2-4\times(-1)\times(20-b)<0\)

\(36+80-4b=29-b<0\)

\(29

 Mar 21, 2021
 #2
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\(29

Jamesaiden  Mar 22, 2021

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