Question

If x=2 is a root of the equation x²-4x+a=0, then a = ......,select a proper option (a), (b), (c) or (d) from given options so that the statement becomes correct.
(a) -2
(b) 2
(c) -4
(d) 4

Answer 1

D is the correct answer.....
Solution attached in the image...

Hope this helps....

Answer 2

D is the correct option.
Given-
Zero of the polynomial x i.e. = 2
Put this value in the given equation.
x^2 - 4x + a = 0
=》2^2 - 4×2 + a = 0
=》4 - 8 + a = 0
=》-4 + a = 0
=》a = 4