What is the factored form of the following expression?
x^2 - 10xy + 21y^2
(1 point)
A. (x - 3y)(x - 7y)
B. (x + 3y)(x - 7y)
C. (x + 3y)(x + 7y)
D. (x - 3y)(x + 7y)
The factored form of the expression x^2 - 10xy + 21y^2 is (x - 3y)(x - 7y).
So, the correct option is A.