Question

(3x + 5) is a factor of the polynomial
(a - 1)x3 + (a + 1)x2 - (2a + 1)x - 15. Find
the value of 'a'. For this value of 'a', factorise
the given polynomial completely.​

Answer 1

Step-by-step explanation:

3x + 5 = 0

3x = -5

x = -5/3

Putting this value in equation.

We have,

(a - 1)3× -5/3 + (a + 1)2× -5/3 - (2a + 1)-5/3 -15

-5a +5 -10/3a - 10/3 + 10/3a + 5/3 - 15

Answer 2

Answer:

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Step-by-step explanation:

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