Question

question 10 of 10
how would the expression $x^2 - 4$ be rewritten using difference of squares?

a. $(x + 4)(x - 4)$
b. $(x + 2)(x - 2)$
c. $(x + 2)^2$
d. $(x - 4)^2$

Explanation:

Step1: Recall Difference of Squares formula

The formula is $a^2 - b^2 = (a+b)(a-b)$.

Step2: Identify a and b in the expression

For $x^2 - 4$, $a = x$ (since $x^2 = (x)^2$) and $b = 2$ (since $4 = (2)^2$).

Step3: Apply the formula

Substitute into the formula: $(x + 2)(x - 2)$.

Answer:

B. $(x + 2)(x - 2)$