How do you factor 9ay^2 - 21a^2y + 6a^3?
I know that you do:
3a(3y^2-7ay+2a^2)
3a(y^2-7ay+6a^2)
3a(y-6a)(y-a)
Then what do you do?
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I know that you do:
3a(3y^2-7ay+2a^2)
3a(y^2-7ay+6a^2)
3a(y-6a)(y-a)
Then what do you do?
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Answers & Comments
Verified answer
You're correct up to this point:
3a(3y^2-7ay+2a^2)
But then you can't arbitrarily move the 3 from the y^2 to the a^2.
3a(3y^2-7ay+2a^2)
3a(3y - a)(y - 2a)
That's it! :)