Asked by jodi
If (x-3) is a factor of 3x^3+bx^2-17x-12.
a. Find the value of b.
b.Hence , find the roots fo the equation 3x^3+bx^2-17x-12=0.
a. Find the value of b.
b.Hence , find the roots fo the equation 3x^3+bx^2-17x-12=0.
Answers
Answered by
bobpursley
if x=3, then f(x)=0, so put in x=3 into f(x)=0 and solve for b.
Now that you know b, you can divide out the factor (x-2) and are left with a quadratic 3x^2+ ... which if =0, then you can factor or use the quadratic equation to find those two roots.
Now that you know b, you can divide out the factor (x-2) and are left with a quadratic 3x^2+ ... which if =0, then you can factor or use the quadratic equation to find those two roots.
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.