that is not the correct method to solve a quadratic inequality.
now think about the graph of the parabola y = x(x+2) ... its zeros are x = 0 and x = -2 ... where (x-values) are the y-values > 0 ?
I figure that the domain can't include -4 and is greater than or equal to zero
working from there I get
, is greater than or equal to zero so
is greater than or equal to
and therefore x is greater than or equal to -2
however I have been told the answer is actually x equal to or LESS than -2
I don't understand, where did x become less than -2?