Answer :
Answer:
(20x + 7y) (20x - 7y)
Step-by-step explanation:
400x²-49y² = (20x + 7y) (20x - 7y)
Answer:
(20x - 7y)(20x + 7y).
Step-by-step explanation:
This is the difference of 2 squares;
a^2 - b^2 = (a - b)(a + b). So:
400x^2-49y^2
= (20x - 7y)(20x + 7y).