10cos^2x+21cosx-10=0factor

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Solution for 10cos^2x+21cosx-10=0factor equation:


Simplifying
10cos2x + 21cosx + -10 = 0factor

Reorder the terms:
-10 + 21cosx + 10cos2x = 0factor

Anything times zero is zero.
-10 + 21cosx + 10cos2x = 0acfort

Solving
-10 + 21cosx + 10cos2x = 0

Solving for variable 'c'.

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

Add '10' to each side of the equation.
-10 + 21cosx + 10 + 10cos2x = 0 + 10

Reorder the terms:
-10 + 10 + 21cosx + 10cos2x = 0 + 10

Combine like terms: -10 + 10 = 0
0 + 21cosx + 10cos2x = 0 + 10
21cosx + 10cos2x = 0 + 10

Combine like terms: 0 + 10 = 10
21cosx + 10cos2x = 10

Reorder the terms:
-10 + 21cosx + 10cos2x = 10 + -10

Combine like terms: 10 + -10 = 0
-10 + 21cosx + 10cos2x = 0

The solution to this equation could not be determined.

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