What number is needed to complete the square x2-3x equals 0?

Answer 1

x2-3x + (-3/2)2 = 0 + (-3/2)2

x2-3x+2.25 =0 + 2.25

(x-1.5)2 = 2.25

SQROOT [(x-1.5)2] = SQROOT [2.25]

x-1.5 = 1.5 & x-1.5 =-1.5

x = 3 & x=0