To multiply monomials, multiply the coefficients (the numbers that come before the variables) of each term, add the exponents of like variables, and multiply the different variables together.

(3a)(4ab) - (8a²)(7b)
(3 x 4)(a x a x b) - (8 x 7)(a² x b)
(12)(a¹⁺¹ x b) - (56)(a²b)
12a²b - 56a²b
-44a²b

To multiply monomials, multiply the coefficients (the numbers that come before the variables) of each term, add the exponents of like variables, and multiply the different variables together.

(4a)(8ab) + (5a²)(8b)
(4 x 8)(a x a x b) + (5 x 8)(a² x b)
(32)(a¹⁺¹ x b) + (40)(a²b)
32a²b + 40a²b
72a²b

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.)

8b(b - z)
8(6)(6 - 4)
8(6)(2)
(48)(2)
96

The circumference of a circle is the distance around its perimeter and equals π (approx. 3.14159) x diameter: c = π d. The area of a circle is π x (radius)² : a = π r².

An isosceles triangle has two sides of equal length. An equilateral triangle has three sides of equal length. In a right triangle, two sides meet at a right angle.