x^3+6x^2+7x-2cos(x)=0

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Solution for x^3+6x^2+7x-2cos(x)=0 equation:


Simplifying
x3 + 6x2 + 7x + -2cos(x) = 0

Multiply cos * x
x3 + 6x2 + 7x + -2cosx = 0

Reorder the terms:
-2cosx + 7x + 6x2 + x3 = 0

Solving
-2cosx + 7x + 6x2 + x3 = 0

Solving for variable 'c'.

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

Add '-7x' to each side of the equation.
-2cosx + 7x + 6x2 + -7x + x3 = 0 + -7x

Reorder the terms:
-2cosx + 7x + -7x + 6x2 + x3 = 0 + -7x

Combine like terms: 7x + -7x = 0
-2cosx + 0 + 6x2 + x3 = 0 + -7x
-2cosx + 6x2 + x3 = 0 + -7x
Remove the zero:
-2cosx + 6x2 + x3 = -7x

Add '-6x2' to each side of the equation.
-2cosx + 6x2 + -6x2 + x3 = -7x + -6x2

Combine like terms: 6x2 + -6x2 = 0
-2cosx + 0 + x3 = -7x + -6x2
-2cosx + x3 = -7x + -6x2

Add '-1x3' to each side of the equation.
-2cosx + x3 + -1x3 = -7x + -6x2 + -1x3

Combine like terms: x3 + -1x3 = 0
-2cosx + 0 = -7x + -6x2 + -1x3
-2cosx = -7x + -6x2 + -1x3

Divide each side by '-2osx'.
c = 3.5o-1s-1 + 3o-1s-1x + 0.5o-1s-1x2

Simplifying
c = 3.5o-1s-1 + 3o-1s-1x + 0.5o-1s-1x2

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