29+-+Sec.+10.3

**M** **u** **l** **t** **i** **p** **l** **y** **i** **n** **g** **Polynomials** **__BY Leo, Colin, and Ken__**
 * S** **e** **c** **t** **i** **o** **n** **10** **.** **3**
 * Multiplying Perfect Squares **
 * 1) Write the equation.
 * 2) Write the equation again, only this time, write it as (x + a) (x - a)
 * 3) F.O.I.L. the equation. Multiply: the first term of the first set of parentheses by the first term of the second set of parentheses; the 2 outermost terms; the 2 innermost terms; the last term of the first set of parentheses by the last term of the second set of parentheses.
 * 4) Combine like terms.
 * 5) Write your answer in standard form and then circle it.

Link for more information: multiplying polynomials dolphin polynomial game

Example 1)

(3x+9)(3x-9)= 9x^2 -27x + 27x -81 = 9x^2 - 81 ​ Example 2) Example 3) (x+3)(x-3)=x^2-3x+3x-9=x^2-9

PRACTICE PROBLEMS: S a m p l e 1 : **(x****+5) (x-5)** S a m p l e 2 : multiply (8c+5)(8c-5) S a m p l e 3 : (6f-2)(6f+2)