Quote:
Originally Posted by metaphor-  what can x equal?
(x + 1)(x – 3) = 0 |
-1 and 3
Whats wrong:
i = (-1)^{1/2} = ((-1)^{3})^{1/2} = (-1)^{3/2} = ((-1)^{1/2})^{3} = (i)^{3} = -i
\Rightarrow 1 = -1
Whats wrong:
x^2 - x^2 = x^2 - x^2
x(x - x) = (x - x)(x + x)
x = (x + x)
x = 2x
\Rightarrow 1 = 2
