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 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:

x² - 3x - 36 = -5x - 1
x² - 3x - 36 + 1 = -5x
x² - 3x + 5x - 35 = 0
x² + 2x - 35 = 0

Next, factor the quadratic equation:

x² + 2x - 35 = 0
(x - 5)(x + 7) = 0

For this expression to be true, the left side of the expression must equal zero. Therefore, either (x - 5) or (x + 7) must equal zero:

If (x - 5) = 0, x must equal 5
If (x + 7) = 0, x must equal -7

So the solution is that x = 5 or -7

To factor a quadratic expression, apply the FOIL (First, Outside, Inside, Last) method in reverse.

A cube is a rectangular solid box with a height (h), length (l), and width (w). The volume is h x l x w and the surface area is 2lw x 2wh + 2lh.

To combine like terms, add or subtract the coefficients (the numbers that come before the variables) of terms that have the same variable raised to the same exponent.

6a⁴ - 3a⁴ = 3a⁴