Parabola of the Form y=x²+c: Identify positive and negative domains on a graph

Find the positive area of the function

$f(x)=x^2$

$x≠0$

Find the negative area of the function

$f(x)=-x^2$

x≠0

Find the positive area of the function
$f(x)=-x^2+9$

-3 < x < 3

Find the positive area of the function

$f(x)=2x^2-50$

x < -5 o 5 < x

Find the negative area of the function

$f(x)=x^2-4$

-2 < x < 2

Find the positive area of the function

$f(x)=x^2-4$

x<-2\text{ } o 2 < x

Find the negative area of the function

$f(x)=x^2-16$

-4 < x < 4

Find the negative area of the function

$f(x)=x^2+16$

Always positive