The correct answer is (A) :

Given : x^2 + 20 = 2x

Then : x^2 – 2x + 20 = 0

a = 1, b = -2, c = 20

The quadratic formula is :

x = (- b ± √(b^2 – 4ac)) / (2a)

Substitute the values in formula

x = -(-2) ± √((-2)^2 – 4(1)(20)) / 2(1)

x = 2 ± 2 i √19 / 2

x = 1 – i √19 and 1 + i √19

Hence the value of X is x = 1 – i √19 and 1 + i √19