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# algebra

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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
+149
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\(29

Jamesaiden  Mar 22, 2021