wertbberbta wertbberbta

09-06-2020
Mathematics

contestada

Plz help me :(

Prove for any value of y the value of expression y^4−(y^2−9)(y^2+9) is divisible by 9.

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jaimemenendezalvarez jaimemenendezalvarez

09-06-2020

PROOF:

[tex]y^4-(y^2-9)(y^2+9)\\=y^4 -(y^4-81)\\=y^4-y^4+81\\=81[/tex]

And 81 is ALWAYS divisible by 9

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sashaprabu sashaprabu

13-01-2021

Answer:

Its 9*9

Step-by-step explanation:

The equation equals 81 and 9*9=81.

Have a great day! :)

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