What do I do wrong when solving square inequality?
I have this enequality:
1) I find the area of determination (sorry if I misuse math slang),
because the expression under roots cannot be negative
x+5>=0 x>=-5 and
which means -5<=x<=8
2) Now I work with my inequation
Now because both left and right sides of the inequality ARE positive
(because squre roots are positive) I can make them both in 2nd power and the truthfulness of the statement won't change.
I solve this enequality and find area of x-s which lie into the determination area (however this is called :)
which I thought was the answer two the exersice,but
the correct answer (thank's God we have answers in the math book)
What do I do wrong?