f(x)=-7x^2+4x+9

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Solution for f(x)=-7x^2+4x+9 equation: 


Simplifying
f(x) = -7x2 + 4x + 9

Multiply f * x
fx = -7x2 + 4x + 9

Reorder the terms:
fx = 9 + 4x + -7x2

Solving
fx = 9 + 4x + -7x2

Solving for variable 'f'.

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

Divide each side by 'x'.
f = 9x-1 + 4 + -7x

Simplifying
f = 9x-1 + 4 + -7x

Reorder the terms:
f = 4 + 9x-1 + -7x

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