anonymous
  • anonymous
Suppose that x* means 5x2 - x, then what does (y+3)* mean?
Mathematics
schrodinger
  • schrodinger
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anonymous
  • anonymous
That should be squared..
anonymous
  • anonymous
No, those are the only instructions. But 5x is squared. Do I maybe plug in (y+3)?
anonymous
  • anonymous
It was a guess ha

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anonymous
  • anonymous
Maybe 5(y+3)^2-(y+3) 5(y+3) (y+3)* = 5y+15?
anonymous
  • anonymous
So you only take a y out of the second term? Not the first squared y?
anonymous
  • anonymous
Yes so you get 5(y+3)(y+3)-(y+3) So the (y+3) crosses out leaving just 5(y+3)?
anonymous
  • anonymous
I hope so.
Directrix
  • Directrix
(y+3)* = 5y^2+30y+45 - (y + 3) (y+3)* = 5y^2+30y+45 -1 (y + 3) (y+3)* = 5y^2+30y+45 -y -3 (y+3)* = 5y^2 +29y - 42

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