If (4 - x)/(3 + x) = x, what is the value of x^2 + 4x - 4?	Choose the correct option.
A) -4  B) -1  C) 0  D) 1  E) 4
(4-x) = x*(3+x)   (4-x) = 3x+x^2   0 = x^2+4x-4   The answer is 0.
<result>C</result>
If (4 - x)/(3 + x) = x, what is the value of x^2 + 4x - 4?