4cos^2x-9cosx-7=0

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Solution for 4cos^2x-9cosx-7=0 equation:


Simplifying
4cos2x + -9cosx + -7 = 0

Reorder the terms:
-7 + -9cosx + 4cos2x = 0

Solving
-7 + -9cosx + 4cos2x = 0

Solving for variable 'c'.

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

Add '7' to each side of the equation.
-7 + -9cosx + 7 + 4cos2x = 0 + 7

Reorder the terms:
-7 + 7 + -9cosx + 4cos2x = 0 + 7

Combine like terms: -7 + 7 = 0
0 + -9cosx + 4cos2x = 0 + 7
-9cosx + 4cos2x = 0 + 7

Combine like terms: 0 + 7 = 7
-9cosx + 4cos2x = 7

Reorder the terms:
-7 + -9cosx + 4cos2x = 7 + -7

Combine like terms: 7 + -7 = 0
-7 + -9cosx + 4cos2x = 0

The solution to this equation could not be determined.

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