x^2-2x-4cos(3x)=0

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Solution for x^2-2x-4cos(3x)=0 equation:


Simplifying
x2 + -2x + -4cos(3x) = 0

Remove parenthesis around (3x)
x2 + -2x + -4cos * 3x = 0

Reorder the terms for easier multiplication:
x2 + -2x + -4 * 3cos * x = 0

Multiply -4 * 3
x2 + -2x + -12cos * x = 0

Multiply cos * x
x2 + -2x + -12cosx = 0

Reorder the terms:
-12cosx + -2x + x2 = 0

Solving
-12cosx + -2x + x2 = 0

Solving for variable 'c'.

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

Add '2x' to each side of the equation.
-12cosx + -2x + 2x + x2 = 0 + 2x

Combine like terms: -2x + 2x = 0
-12cosx + 0 + x2 = 0 + 2x
-12cosx + x2 = 0 + 2x
Remove the zero:
-12cosx + x2 = 2x

Add '-1x2' to each side of the equation.
-12cosx + x2 + -1x2 = 2x + -1x2

Combine like terms: x2 + -1x2 = 0
-12cosx + 0 = 2x + -1x2
-12cosx = 2x + -1x2

Divide each side by '-12osx'.
c = -0.1666666667o-1s-1 + 0.08333333333o-1s-1x

Simplifying
c = -0.1666666667o-1s-1 + 0.08333333333o-1s-1x

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