Roots

Determine the quadratic equation absolute coefficient q, that the equation has a real double root and the root x calculate:

5x2+9x+q=0


Correct result:

q =  4.05
x =  -0.9

Solution:

D=0=>D2=0 D2=b24aq=0 q=9245=4.05 5x2+9x+4.05=0
x=925=0.9



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