Question

Find the value of a and b so that the polynomial x^3-4x^2+ax+b is exay divisible by x-2 as well as x+1

Answer 1

Step-by-step explanation:

in first case,

6-16+2a+b =0

2a+b=10..….(1)

in second case,

-1-4-a-b=0

a+b =-5.…..(2)

using ( 1) and( 2)

a=15 and B=-20

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