Quadratic equation

Determine the numbers b and c that the numbers x1 = -8 and x2 = -1 were roots of the quadratic equation:

3x2+bx+c=0

Final Answer:

b =  -27
c =  -24

Step-by-step explanation:

a x2+b x+c=0 a=3 x1=8 x2=1  a x2+b x+c = a(xx1) (xx2)=0 b=a x1a x2=(3) (8)(3) (1)=27
c=a x1 x2=(3) (8) (1)=24



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