Solving a Root Equation for the Variable r

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SUMMARY

The discussion focuses on rearranging the equation A = πr² + r²√(k²-1) to solve for the variable r. Participants clarify that the equation can be rewritten as r²(π + √(k²-1)) = A, leading to r = √(A / (π + √(k²-1))). The conversation also touches on related equations and the importance of proper notation, particularly when dealing with square roots and algebraic fractions. The final consensus emphasizes the necessity of taking the square root of both sides of the equation to isolate r correctly.

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  • #61
In fact, perhaps your original post contained a typo. You went from
A = πr² + r²root(k²-1) to r³ = (2A/π+root(k²-1)
Did you really mean the r³, rather than r²?
 
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  • #62
:redface: i believe your right
 

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