fx=6a*6a-9a*9a+4

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Solution for fx=6a*6a-9a*9a+4 equation: 


Simplifying
fx = 6a * 6a + -9a * 9a + 4

Reorder the terms for easier multiplication:
fx = 6 * 6a * a + -9a * 9a + 4

Multiply 6 * 6
fx = 36a * a + -9a * 9a + 4

Multiply a * a
fx = 36a2 + -9a * 9a + 4

Reorder the terms for easier multiplication:
fx = 36a2 + -9 * 9a * a + 4

Multiply -9 * 9
fx = 36a2 + -81a * a + 4

Multiply a * a
fx = 36a2 + -81a2 + 4

Reorder the terms:
fx = 4 + 36a2 + -81a2

Combine like terms: 36a2 + -81a2 = -45a2
fx = 4 + -45a2

Solving
fx = 4 + -45a2

Solving for variable 'f'.

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

Divide each side by 'x'.
f = 4x-1 + -45a2x-1

Simplifying
f = 4x-1 + -45a2x-1

Reorder the terms:
f = -45a2x-1 + 4x-1

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