f(-3)=3x^2-5x-7

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Solution for f(-3)=3x^2-5x-7 equation: 


Simplifying
f(-3) = 3x2 + -5x + -7

Reorder the terms for easier multiplication:
-3f = 3x2 + -5x + -7

Reorder the terms:
-3f = -7 + -5x + 3x2

Solving
-3f = -7 + -5x + 3x2

Solving for variable 'f'.

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

Divide each side by '-3'.
f = 2.333333333 + 1.666666667x + -1x2

Simplifying
f = 2.333333333 + 1.666666667x + -1x2

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