CBSE Class 9 Answered
Find a and b if x-1 and x-2 exactly divide the polynomial x3 + ax2 - bx + 10
Asked by akash1729 | 08 Mar, 2008, 07:14: PM
Expert Answer
x-1 exactly divide the given polynomial, so after dividing we get,
11-a+b=0
And this gives a= 11+b
And x-2 exactly divide the given polynomial, so after dividing we get,
18+4a-2b=0.
putting the value of a we get,
18+44+4b-2b= 0
62+2b=0
so, b= -31
and so a= 11-31= -20
Answered by | 12 Mar, 2008, 12:33: PM
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