To multiply binomials, use the FOIL method. FOIL stands for First, Outside, Inside, Last and refers to the position of each term in the parentheses:

(y + 8)(y - 7)
(y x y) + (y x -7) + (8 x y) + (8 x -7)
y² - 7y + 8y - 56
y² + y - 56

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.

To solve this equation, replace the variables with the values given and then solve the now variable-free equation. (Remember order of operations, PEMDAS, Parentheses, Exponents, Multiplication/Division, Addition/Subtraction.)

-3c(c - x)
-3(-8)(-8 - 3)
-3(-8)(-11)
(24)(-11)
-264

To factor a quadratic expression, apply the FOIL method (First, Outside, Inside, Last) in reverse. First, find the two Last terms that will multiply to produce -5 as well and sum (Inside, Outside) to equal 4. For this problem, those two numbers are -1 and 5. Then, plug these into a set of binomials using the square root of the First variable (y²):

y² + 4y - 5
y² + (-1 + 5)y + (-1 x 5)
(y - 1)(y + 5)

The surface area of a cube is (2 x length x width) + (2 x width x height) + (2 x length x height):

sa = 2lw + 2wh + 2lh
sa = (2 x 6 x 6) + (2 x 6 x 2) + (2 x 6 x 2)
sa = (72) + (24) + (24)
sa = 120