Answer:
C. (7x + 4)(7x − 4)
Step-by-step explanation:
Given expression:
49x² - 16
Using difference of two squares:
A² - B² = (A + B)(A - B)
49x² - 16 = (7x)² - (4)²
= (7x + 4)(7x - 4)
C. (7x + 4)(7x − 4)
Check:
(7x + 4)(7x − 4)
Open parenthesis
= 49x² - 28x + 28x - 16
= 49x² - 16
