tan^2x-21=0

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Solution for tan^2x-21=0 equation: 


Simplifying
tan2x + -21 = 0

Reorder the terms:
-21 + an2tx = 0

Solving
-21 + an2tx = 0

Solving for variable 'a'.

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

Add '21' to each side of the equation.
-21 + 21 + an2tx = 0 + 21

Combine like terms: -21 + 21 = 0
0 + an2tx = 0 + 21
an2tx = 0 + 21

Combine like terms: 0 + 21 = 21
an2tx = 21

Divide each side by 'n2tx'.
a = 21n-2t-1x-1

Simplifying
a = 21n-2t-1x-1

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