What are the steps on how to factor the difference of squares?

The formula for the difference of squares:  a^2 – b^2 = (a + b)(a – b)

Example:  If x^2 - 4

x^2 - 2^2

(x + 2)(x - 2)

step-by-step explanation :

we know that

the measurement of the outer angle is the semi-difference of the arcs which comprises

in this problem

m< xzy is the outer angle

substitute the values

the measure of angle xoy is equal to

> by central angle

substitute the value

answer: your answer is a