C(r)=3r(r-2)+5

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Solution for C(r)=3r(r-2)+5 equation: 


Simplifying
C(r) = 3r(r + -2) + 5

Multiply C * r
rC = 3r(r + -2) + 5

Reorder the terms:
rC = 3r(-2 + r) + 5
rC = (-2 * 3r + r * 3r) + 5
rC = (-6r + 3r2) + 5

Reorder the terms:
rC = 5 + -6r + 3r2

Solving
rC = 5 + -6r + 3r2

Solving for variable 'r'.

Reorder the terms:
-5 + 6r + rC + -3r2 = 5 + -6r + 3r2 + -5 + 6r + -3r2

Reorder the terms:
-5 + 6r + rC + -3r2 = 5 + -5 + -6r + 6r + 3r2 + -3r2

Combine like terms: 5 + -5 = 0
-5 + 6r + rC + -3r2 = 0 + -6r + 6r + 3r2 + -3r2
-5 + 6r + rC + -3r2 = -6r + 6r + 3r2 + -3r2

Combine like terms: -6r + 6r = 0
-5 + 6r + rC + -3r2 = 0 + 3r2 + -3r2
-5 + 6r + rC + -3r2 = 3r2 + -3r2

Combine like terms: 3r2 + -3r2 = 0
-5 + 6r + rC + -3r2 = 0

The solution to this equation could not be determined.

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