Solve each of the following equations by using the method of completing the square:
Given: 
2x2 - 5x + 2 = 0
4x2 - 10x + 4 = 0
4x2 - 10x = - 4 (multiplying both sides by 2)
(adding 
on both sides)
using a2 - 2ab + b2 = (a - b)2
(taking square root on both sides)
Hence the roots of equation are 
11