Let *x* (very wierd if you ask me) be defined as *x* = x^2-x for all values of x. If *a*=*a-2*, what is the value of a?

a)1

b)1/2

c)3/2

d)6/5

e)3

I got this: (a-2)^2-(a-2) = a^2-3a+6. But the answer I got for a isn't in the choices. Any tips? Thanks in advance