Quadratic inequation

If 5x + x² > 100, then x is not

Correct answer:

x =  

Step-by-step explanation:

5x+x2−100=0  x2+5x−100=0  a=1;b=5;c=−100 D=b2−4ac=52−4⋅1⋅(−100)=425 D>0  x1,2​=2a−b±D​​=2−5±425​​=2−5±517​​ x1,2​=−2.5±10.307764 x1​=7.807764064 x2​=−12.807764064 x>x1​ x=x<x2​=

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Showing 1 comment:
Math student
x not in interval <-12.807764064; 7.80776406404>





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