Find the Range f(x)=-4x^2-12x+3

$f (x) = - 4 x^{2} - 12 x + 3$

Step 1

The range is the set of all valid $y$ values. Use the graph to find the range.

Interval Notation:

$(- \infty, 12]$

Set-Builder Notation:

${y | y \leq 12}$

Step 2