Identify Special Products: Recognize the special products in the expression.The expression (x2−4)(x2+6x+9) contains two parts that can be identified as special products. The first part, x2−4, is a difference of squares. The second part, x2+6x+9, is a perfect square trinomial.
Factor Difference of Squares: Factor the difference of squares.The difference of squares can be factored as (a2−b2)=(a+b)(a−b). In this case, a is x and b is 2.So, x2−4=(x+2)(x−2).
Factor Perfect Square Trinomial: Factor the perfect square trinomial.The perfect square trinomial can be factored as (a+b)2=a2+2ab+b2. In this case, a is x and b is 3.So, x2+6x+9=(x+3)2.
Write Factored Expression: Write the expression with the factored parts.Replace the original expression with the factored parts from Step 2 and Step 3.(x2−4)(x2+6x+9)=(x+2)(x−2)(x+3)2.
Check for Further Factoring: Check for any further factoring.The expression (x+2)(x−2)(x+3)2 is already fully factored. There are no common factors to factor out, and each part is in its simplest form.