A second-degree polynomial equation of the form ax² + bx + c = 0, where a ≠ 0.
A quadratic equation graphs as a parabola and has at most two solutions (roots).
x = (−b ± √(b² − 4ac)) / 2a
2x² + 5x − 3 = 0 → x = (−5 ± √(25+24)) / 4 = (−5 ± 7) / 4 → x = 0.5 or x = −3
A number expressed as a fraction of 100, used to describe proportions and rates of change.
A measure of the spread or dispersion of a data set from its mean (average).
Three measures of central tendency used to describe the center of a data set.
A fundamental relation in geometry: the square of the hypotenuse equals the sum of squares of the other two sides.
Area measures the surface inside a shape (in square units); perimeter measures the distance around it.
A number representing a part of a whole, written as a numerator over a denominator.