Question

find the product
$(x - 5)(x + 5)$
$(x - 5)(x + 5) = \square$ (simplify your answer.)

Explanation:

Step1: Apply difference of squares rule

Recall that $(a-b)(a+b)=a^2-b^2$. Here $a=x$, $b=5$.

Step2: Substitute values into formula

$x^2 - 5^2$

Step3: Calculate the constant term

$x^2 - 25$

Answer:

$x^2 - 25$