f(-1)=-(x^2+2x-3)

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


Simplifying
f(-1) = -1(x2 + 2x + -3)

Reorder the terms for easier multiplication:
-1f = -1(x2 + 2x + -3)

Reorder the terms:
-1f = -1(-3 + 2x + x2)
-1f = (-3 * -1 + 2x * -1 + x2 * -1)
-1f = (3 + -2x + -1x2)

Solving
-1f = 3 + -2x + -1x2

Solving for variable 'f'.

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

Divide each side by '-1'.
f = -3 + 2x + x2

Simplifying
f = -3 + 2x + x2

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