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

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 6 as well and sum (Inside, Outside) to equal 7. For this problem, those two numbers are 1 and 6. Then, plug these into a set of binomials using the square root of the First variable (y²):

y² + 7y + 6
y² + (1 + 6)y + (1 x 6)
(y + 1)(y + 6)

The area of a rectangle is equal to its length x width:

a = l x w
a = a x b
a = 2 x 8
a = 16

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 + 2)(y - 4)
(y x y) + (y x -4) + (2 x y) + (2 x -4)
y² - 4y + 2y - 8
y² - 2y - 8

A parallelogram is a quadrilateral with two sets of parallel sides. Opposite sides (a = c, b = d) and angles (red = red, blue = blue) are equal. The area of a parallelogram is base x height and the perimeter is the sum of the lengths of all sides (a + b + c + d).