Answer:
D
Step-by-step explanation:
49x² - 81y² ← is a difference of squares and factors in general as
a² - b² = (a + b)(a - b) , thus
49x² - 81y²
= (7x)² - (9y)²
= (7x + 9y)(7x - 9y) → D
Answer:
[tex] = (7x - 9y)(7x + 9y) [/tex]
Answer D is correct
Step-by-step explanation:
[tex]49 {x}^{2} - 81 {y}^{2} \\ {7}^{2} {x}^{2} - {9}^{2} {y}^{2} \\ = (7x - 9y)(7x + 9y) [/tex]
hope this helps
