f(9)=3x^2-1

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Solution for f(9)=3x^2-1 equation: 


Simplifying
f(9) = 3x2 + -1

Reorder the terms for easier multiplication:
9f = 3x2 + -1

Reorder the terms:
9f = -1 + 3x2

Solving
9f = -1 + 3x2

Solving for variable 'f'.

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

Divide each side by '9'.
f = -0.1111111111 + 0.3333333333x2

Simplifying
f = -0.1111111111 + 0.3333333333x2

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