Answer:
4. C. x = 4 or -4
Step-by-step explanation:
since both terms are perfect squares, factor using the difference of squares formula, a² - b² = ( a + b ) (
- b ) where
<span>The signs of the values of m and b<span> are the same.</span></span>
Additive identity because that is the property when you add something to 0 and get the same thing
Look at picture for details