Question

Y cube + y square minus y minus one

Answer 1

Answer:

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Answer 2

Step-by-step explanation:

Y³ + y² - y -1

= y²(y + 1) - 1(y + 1)

=( y² - 1)( y +1)

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

hence, (y -1) , (y +1) and (y +1) are the three factors of y³ +y² - y -1

hence,

roots :-

(y -1)(y+1)² = 0

y = 1 , -1

hence, 1 , -1 and -1 are the roots of given polynomial .

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