Solve the formula for r.

Question

36(r-4)^2=A

Answer 1

Here is the best way.

 

Multiply both sides of equation by 1/36.

 

(r - 4)² = (1/36)A

 

 

Square-root both sides of the equation.

 

r - 4 = ±(1/6)√(A)

 

 

Add 4 to both sides of the equation.

 

r = 4 ± (1/6)√A