(Q3) Solve the equations by completing the square.

(i)x2 - 10x + 9 = 0

Answer:

Given x2 - 10x + 9 = 0

x2- 10x = -9

x2 - 2.x.5 = -9

x2-2.x.5 + 25 = -9+25

(x - )2=

∴x - = ±

∴x - = (or)x-= -

x = or x=