f(3)-9=4n^2+5n

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Solution for f(3)-9=4n^2+5n equation:


Simplifying
f(3) + -9 = 4n2 + 5n

Reorder the terms for easier multiplication:
3f + -9 = 4n2 + 5n

Reorder the terms:
-9 + 3f = 4n2 + 5n

Reorder the terms:
-9 + 3f = 5n + 4n2

Solving
-9 + 3f = 5n + 4n2

Solving for variable 'f'.

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

Add '9' to each side of the equation.
-9 + 9 + 3f = 5n + 9 + 4n2

Combine like terms: -9 + 9 = 0
0 + 3f = 5n + 9 + 4n2
3f = 5n + 9 + 4n2

Reorder the terms:
3f = 9 + 5n + 4n2

Divide each side by '3'.
f = 3 + 1.666666667n + 1.333333333n2

Simplifying
f = 3 + 1.666666667n + 1.333333333n2

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