Question

if x minus 2 is a factor of x cube minus 2 X square + a x minus 1 then the value of a is​

Answer 1

Step-by-step explanation:

(x - 2) is a factor of the cubic polynomial

x³ - 2x² + ax - 1 = 0

So , x - 2 = 0

x = 2

Now , (2)³ - 2(2)² + a(2) - 1 = 0

(2)³ - (2)³ + 2a - 1 = 0

2a - 1 = 0

2a = 1

a = 1/2

Answer 2

Answer:

x-2=0

x=2

put x=2 in the equation

so p(2)=0                        [as x-2 is a factor]

so 8-8+2a-1=0

2a=1

a=1/2

Step-by-step explanation: