what is the completely factored form of x4y – 4x2y – 5y?
y(x2 – 5)(x2 1)
y(x2 5)(x2 – 1)
(x2y – 5)(x2 1)
(x2y 5)(x2 – 1)
y(x2 – 5)(x2 1)
y(x2 5)(x2 – 1)
(x2y – 5)(x2 1)
(x2y 5)(x2 – 1)