C(x)=5x^2-30x+81

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Solution for C(x)=5x^2-30x+81 equation: 


Simplifying
C(x) = 5x2 + -30x + 81

Multiply C * x
xC = 5x2 + -30x + 81

Reorder the terms:
xC = 81 + -30x + 5x2

Solving
xC = 81 + -30x + 5x2

Solving for variable 'x'.

Reorder the terms:
-81 + 30x + xC + -5x2 = 81 + -30x + 5x2 + -81 + 30x + -5x2

Reorder the terms:
-81 + 30x + xC + -5x2 = 81 + -81 + -30x + 30x + 5x2 + -5x2

Combine like terms: 81 + -81 = 0
-81 + 30x + xC + -5x2 = 0 + -30x + 30x + 5x2 + -5x2
-81 + 30x + xC + -5x2 = -30x + 30x + 5x2 + -5x2

Combine like terms: -30x + 30x = 0
-81 + 30x + xC + -5x2 = 0 + 5x2 + -5x2
-81 + 30x + xC + -5x2 = 5x2 + -5x2

Combine like terms: 5x2 + -5x2 = 0
-81 + 30x + xC + -5x2 = 0

The solution to this equation could not be determined.

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