CBSE Class 9 Answered
Find value of a and b so that the polynomial x cube-ax square=13x+b has x-1 and x+3 as factors.
Asked by Yohan Zachariah | 12 Jul, 2011, 02:10: AM
Expert Answer
As x-1 and x+3 are factors of the polynomial they will satisfy the 2 equations
putting x=1 and x=-3 we will get
1-a=13+b
a+b= -12
a+b= -12-27-9a= -39+b 9a+b=12
9a+b=12solving the above 2 equations we get
a=3 and b=-15
Answered by | 11 Jul, 2011, 09:47: PM
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