Precalculus Examples

$x = \frac{- 1.4 - \sqrt{- {1.4}^{2} - 4 \cdot - 0.02 \cdot 5.7}}{2 (- 0.02)}$

Step 1

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

Interval Notation:

$(- \infty, \infty)$

Set-Builder Notation:

${y | y \in ℝ}$

Step 2