(1)x²+xy-6y² =x²+3xy-2xy-6y²=x(x+3y)-2y(x+3y)=(x+3y)(x-2y)
(2)a²-6ab+5b² =(a-b)(a-5b)
(3)x²-4xy+3y² =(x-y)(x-3y)
(4)x²+2ax-3a² =(x-a)(x+3a)
(1)x²+xy-6y² =x²+3xy-2xy-6y²=x(x+3y)-2y(x+3y)=(x+3y)(x-2y)
(2)a²-6ab+5b² =(a-b)(a-5b)
(3)x²-4xy+3y² =(x-y)(x-3y)
(4)x²+2ax-3a² =(x-a)(x+3a)