Question

If the polynomial 4x^3 + ax^2 - 2x + 7 and 2x^3 + x^2 + x - a leave the remainder when divided by x-3 , then the value of a is ?

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Answer 1

Answer:

a = -13/3

Step-by-step explanation:

value of a....

Let the given polynomials be f(x) and g(x).

When f(x) and g(x) are divided by (x-2) they leave the same remainder.

I.e (x-2) is a factor of f(x) and g(x). It means 2 is the zero of f(x) and g(x)

So that,

f(2) = g(2)

2x³+ax²+3x-5 = x³+x²-4x+a

2(2)³+a(2)²+3(2)-5 = 2³+2²-4(2)+a

2(8)+a(4)+6-5 = 8+4-8+a

16+4a+1 = 4+a

17+4a = 4+a

4a-a = 4-17

3a = -13

a = -13/3.

Answer 2

Answer:

-43/10 is the correct answer

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