Question

Find 'a'if the two polynomials ax²+3x²-9 and 2x²
+ 4x + a leave the same remainder when divided by
x+3.
(ICSE 2015​

Answer 1

Answer:

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Step-by-step explanation:

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Answer 2

Step-by-step explanation:

Let f(x)=ax

3

+3x

2

−9

and g(x)=2x

3

+4x+a

putting x+3=0

x=−3

Since remainder is same f(−3)=g(−3)

a(−3)

3

+3(−3)

2

−9=2(−3)

3

+4(−3)+a

−27a+27−9=−54−12+a

27a+a=27−9+54+12

28a=84

a=3