Question

multiply.
$(w + 7)(w - 7)$
simplify your answer.

Explanation:

Step1: Apply difference of squares rule

Recall that $(a+b)(a-b)=a^2-b^2$. Here $a=w$, $b=7$.

Step2: Substitute values into formula

$$(w+7)(w-7)=w^2-7^2$$

Step3: Calculate the constant term

$$7^2=49$$

Answer:

$w^2 - 49$