pt 2
Solve the inequality
(x+1)(X-1) > 8
X^2 -1 >8
X^2 >9
X >3 or x< -3 looks like 4 out of the interval of 10 40 %
thanks! but it's 60
I failed to account for the fact that (x-1) might be negative or positive ! My bad ! (,.....as they say)
+36915 +36915 
