What is the value of b + c if $x^2+bx+c>0$ only when $x\in (-\infty, -2)\cup(2,\infty)$?
+40 What is the value of b+c if x2+bx+c>0 only whenx∈(−∞,−2)∪(2,∞)?
So this is a parabola that opens up and has x intercepts at (-2,0) and (2,0). The slope is 1. So the equation of the graph is x2−4. Making b=0 and c=-4, so b+c=−4
