Question

Find the value of a and b if(x-1) and (x-2)are factors of x cube -ax+b

Answer 1

Answer:

Step-by-step explanation:

(x-1) then value of x= 1

(x-2 ) then value of x = 2

-ax+b

-ax 1 +b =0

-a= -b

-a x 2 +b = 0

-2a = -b

x cube - ax + b

1 - a-b = 1-a= b 1= a+b

8-1 = 7