The first step to solve a quadratic equation that's set to zero is to factor the quadratic equation:

z² - 3z - 10 = 0
(z + 2)(z - 5) = 0

For this expression to be true, the left side of the expression must equal zero. Therefore, either (z + 2) or (z - 5) must equal zero:

If (z + 2) = 0, z must equal -2
If (z - 5) = 0, z must equal 5

So the solution is that z = -2 or 5

A trapezoid is a quadrilateral with one set of parallel sides.

The coordinate grid is composed of a horizontal x-axis and a vertical y-axis. The center of the grid, where the x-axis and y-axis meet, is called the origin.

A circle is a figure in which each point around its perimeter is an equal distance from the center. The radius of a circle is the distance between the center and any point along its perimeter. A chord is a line segment that connects any two points along its perimeter. The diameter of a circle is the length of a chord that passes through the center of the circle and equals twice the circle's radius (2r).

The formula for area is πr²:

a = πr²
a = π(3²)
a = 9π