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).

A monomial contains one term, a binomial contains two terms, and a polynomial contains more than two terms.

Angles around a line add up to 180°. Angles around a point add up to 360°. When two lines intersect, adjacent angles are supplementary (they add up to 180°) and angles across from either other are vertical (they're equal).

A quadrilateral is a shape with four sides. The perimeter of a quadrilateral is the sum of the lengths of its four sides.

The first step to solve a quadratic expression that's not set to zero is to solve the equation so that it is set to zero:

z² - 10z + 44 = 3z + 4
z² - 10z + 44 - 4 = 3z
z² - 10z - 3z + 40 = 0
z² - 13z + 40 = 0

Next, factor the quadratic equation:

z² - 13z + 40 = 0
(z - 5)(z - 8) = 0

For this expression to be true, the left side of the expression must equal zero. Therefore, either (z - 5) or (z - 8) must equal zero:

If (z - 5) = 0, z must equal 5
If (z - 8) = 0, z must equal 8

So the solution is that z = 5 or 8