Question

If (x-2) is a factor of x^2-ax+4 then the value of a

Answer 1

Answer:

if x-2 =0

x=0+2

x=2

now insert x =2 in equation

x^2 -ax+4=0

2^2 - a×2 +4=0

4-2a +4=0

8-2a =0

8=2a

8/2=a

4=a

theredore the value of a is 4

Answer 2

Answer:

(x-2)^2 = x2-4x+4

compare this with Qn

- 4x=-ax, a=4