Solve each of the following equations by using the method of completing the square:

Given:

2x^{2} - 5x + 2 = 0

4x^{2} - 10x + 4 = 0

4x^{2} - 10x = - 4 (multiplying both sides by 2)

(adding on both sides)

using a^{2} - 2ab + b^{2} = (a - b)^{2}

(taking square root on both sides)

Hence the roots of equation are

11