Question

Factorize factorise y cube + y square minus y minus 1

Answer 1

Given:

y³ + y² - y - 1

To Find:

Factorization

Solution:

y³ + y² - y - 1

Grouping the variables:

(y³ + y²) - (y + 1)

Taking out the common:

y² (y + 1) - 1 (y + 1)

(y² - 1)  (y + 1)

(y² - 1) = 0

y² = 1

y = √1

∴ y = ±1

(y + 1) = 0

y = 0 - 1

∴ y = -1

Answer 2

Answer:

(y+1)(y+1)(y-1)

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