Question

multiply (2x - 3)(2x + 3).

Explanation:

Step1: Apply difference of squares rule

Recall that $(a-b)(a+b)=a^2-b^2$, where $a=2x$, $b=3$.

Step2: Calculate $a^2$

$(2x)^2 = 4x^2$

Step3: Calculate $b^2$

$3^2 = 9$

Step4: Substitute into the formula

$a^2 - b^2 = 4x^2 - 9$

Answer:

$4x^2 - 9$