SOLUTION: range of y(x-x^2)=9+x^2
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Question 386406: range of y(x-x^2)=9+x^2
Answer by robertb(5830) (Show Source): You can put this solution on YOUR website!
. Solve for x in terms of y:
;
.
The discriminant in this case has to be non-negative.
, or .
By using the quadratic formula to get the critical numbers of this inequality, and picking test numbers, we get the solution to be (, ]U [, ).
This is also the range of the given function.
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