4r-9=r^2

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Solution for 4r-9=r^2 equation: 



4r-9=r^2

We move all terms to the left:

4r-9-(r^2)=0

determiningTheFunctionDomain
-r^2+4r-9=0

We add all the numbers together, and all the variables

-1r^2+4r-9=0

a = -1; b = 4; c = -9;
Δ = b2-4ac
Δ = 42-4·(-1)·(-9)
Δ = -20
Delta is less than zero, so there is no solution for the equation

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