Question

I need an explanation as to how to solve it.

F(x)= {x^2, x<-5
ax + b, -5
≤
x
≤
4
x+12, x>4

Answer 1

So:

\[F(x) = \begin{cases}x^2 & x < -5\\ax + b & -5 \leq x \leq 4\\x + 12 & x > 4\end{cases}\]

Answer 2

Are you trying to solve for a and b?