Completing the square
posted by Barbie on .
Please show the procedure for answering this quadratic equation using the completing the square method:
x^2+14x+98
I think i understand the basics of the method, but in this particular question I'm finding it hard to use the appropriate factors of 98  7 and 14  to factorize 14x.

x^2 + 14 x + 98 = 0 I assume
x^2 + 14 x = 98
14/2 = 7
7^2 = 49
x^2 + 14 x + 49 = 98 + 49
(x+7)^2 = 49
square root of a negative number is imaginary
x+7 = 7i or + 7i
x = 7 7i = 7 (1+i)
or
x = 7 + 7i = 7 (1i)