F(x)=-x^3+8x^2+3f(-7)

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Solution for F(x)=-x^3+8x^2+3f(-7) equation: 


Simplifying
F(x) = -1x3 + 8x2 + 3f(-7)

Multiply F * x
xF = -1x3 + 8x2 + 3f(-7)

Reorder the terms for easier multiplication:
xF = -1x3 + 8x2 + 3 * -7f

Multiply 3 * -7
xF = -1x3 + 8x2 + -21f

Reorder the terms:
xF = -21f + 8x2 + -1x3

Solving
xF = -21f + 8x2 + -1x3

Solving for variable 'x'.

Reorder the terms:
21f + xF + -8x2 + x3 = -21f + 8x2 + -1x3 + 21f + -8x2 + x3

Reorder the terms:
21f + xF + -8x2 + x3 = -21f + 21f + 8x2 + -8x2 + -1x3 + x3

Combine like terms: -21f + 21f = 0
21f + xF + -8x2 + x3 = 0 + 8x2 + -8x2 + -1x3 + x3
21f + xF + -8x2 + x3 = 8x2 + -8x2 + -1x3 + x3

Combine like terms: 8x2 + -8x2 = 0
21f + xF + -8x2 + x3 = 0 + -1x3 + x3
21f + xF + -8x2 + x3 = -1x3 + x3

Combine like terms: -1x3 + x3 = 0
21f + xF + -8x2 + x3 = 0

The solution to this equation could not be determined.

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