Question

If x – 2 is a factor of x3 – 3x +5a then the value of a is:

Answer 1

Answer:

Value of a = 0

Given that ;

Equation : x³ - 3x + 5a

Factor = ( x - 2 )

So ,

Root of the given equation ( x ) = 2

x - 2

x = 2

Substitute x value in the given Equation ;

x³ - 3x + 5a

( 2 ) ³ - 3 ( 2 ) + 5a = 0

8 - 6 + 5a = 0

2 + 5a = 0

7a = 0

Hence ;

a = 0