f(-x^2+81)=x^2-81

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Solution for f(-x^2+81)=x^2-81 equation: 


Simplifying
f(-1x2 + 81) = x2 + -81

Reorder the terms:
f(81 + -1x2) = x2 + -81
(81 * f + -1x2 * f) = x2 + -81
(81f + -1fx2) = x2 + -81

Reorder the terms:
81f + -1fx2 = -81 + x2

Solving
81f + -1fx2 = -81 + x2

Solving for variable 'f'.

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

Reorder the terms:
81 + 81f + -1fx2 + -1x2 = -81 + x2 + 81 + -1x2

Reorder the terms:
81 + 81f + -1fx2 + -1x2 = -81 + 81 + x2 + -1x2

Combine like terms: -81 + 81 = 0
81 + 81f + -1fx2 + -1x2 = 0 + x2 + -1x2
81 + 81f + -1fx2 + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
81 + 81f + -1fx2 + -1x2 = 0

The solution to this equation could not be determined.

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