2x^2-4c-18=0

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Solution for 2x^2-4c-18=0 equation:


Simplifying
2x2 + -4c + -18 = 0

Reorder the terms:
-18 + -4c + 2x2 = 0

Solving
-18 + -4c + 2x2 = 0

Solving for variable 'c'.

Move all terms containing c to the left, all other terms to the right.

Add '18' to each side of the equation.
-18 + -4c + 18 + 2x2 = 0 + 18

Reorder the terms:
-18 + 18 + -4c + 2x2 = 0 + 18

Combine like terms: -18 + 18 = 0
0 + -4c + 2x2 = 0 + 18
-4c + 2x2 = 0 + 18

Combine like terms: 0 + 18 = 18
-4c + 2x2 = 18

Add '-2x2' to each side of the equation.
-4c + 2x2 + -2x2 = 18 + -2x2

Combine like terms: 2x2 + -2x2 = 0
-4c + 0 = 18 + -2x2
-4c = 18 + -2x2

Divide each side by '-4'.
c = -4.5 + 0.5x2

Simplifying
c = -4.5 + 0.5x2

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