Math, asked by tiyasa7985, 6 months ago

5. Factorise y4 - 9y2 - 22

Answers

Answered by amitskic4364

1

answer: y4-9y2-22

y4-(11-2)y2-22

y4-11y2+2y2-22

y2(y2-11)+2(y2-11)

(y2-11) (y2+2)

it's final answer: (y2-11) (y2-2)

Answered by dileep1091

1

Answer:

y^4-9y^2-22

=y^4-11y^+2y^2-22

=y^2(y^2-11)+2(y^2-11)

=(y^2+2)(y^2-11)

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