Question

2 y cube plus y square
minus 2 Y - 1

Answer 1

2y³ + y² - 2y - 1

2y³ - 2y + y² - 1

2y(y² - 1) + 1 (y² - 1)

(y² - 1) (2y + 1)

Again y² - 1 is in the form of a² - b² which is equal to (a - b) (a + b)

Therefore
(y + 1) (y - 1) (2y + 1) is the answer.