Hi, I have a problem that trying to solve all evning and it is in two parts (a) If $\displaystyle a$ is a positive constant, find the set of valus of $\displaystyle x $for which $\displaystyle a(x^2 +2x-8)$ is negative. Find the value of a if this function has a minimum value of -27.

(b) Find two quadratic funcions of $\displaystyle x $ which are zero at $\displaystyle x=1$, which take the value of 10 when $\displaystyle x=0 $and which have a maximum value of 18. Sketch the graps of these two functions. Can ou help me with this problem?