Question

If x – a is a factor of x3 – 3x2 a + 2a2x + b then find the value of b. Subject

Answer 1

If x-a is a factor then x - a = 0
Therefore, x = a

Now substitute x value in polynomial
$( { a}^{3}) - 3 ({ a})^{2}a + 2 {a}^{2}( a) + b = 0 \\ {a}^{3 } - 3 {a}^{3} +2 {a}^{3} + b \: = 0 \\ - 3 {a}^{3} + 3 {a}^{3} + b \: = 0 \\ b = 0$

Answer 2

Answer:

value of b is 0

Step-by-step explanation:

solve by taking x-a=0 as factor then taking it x=a then try solving