But what to do about the -3. Eg Do I say:
It seems that that it has to be x + 1 < -3 - works if look at curve graphically.
But then what if problem is
and which is wrong. Should be
-4 < x < 2 - can see graphically that is under x axis and so between -4 and 2.
So what is the rule for bit when get square root of either side???