2x+3 is factor of 2x^3+9x^2-x-b – InterviewSolution

1.

2x+3 is factor of 2x^3+9x^2-x-b

Answer»

2x+3=0

x=-3/2

2x*3+9x*2-x-b

2*-3/2+9*-3/2*2-(-3)/2-b=0

-3+9-3-(-3)-b=0

3-6-b=0

-3-b=0

b=3

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