Question

$(3w - 10)(3w + 10)$

Explanation:

Step1: Apply difference of squares rule

Recall that $(a-b)(a+b)=a^2-b^2$. Here, $a=3w$, $b=10$.

Step2: Calculate each squared term

$(3w)^2 = 9w^2$, $10^2=100$

Step3: Substitute into the formula

$9w^2 - 100$

Answer:

$9w^2 - 100$