x^3+mx^2+nx-8=0

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Solution for x^3+mx^2+nx-8=0 equation:


Simplifying
x3 + mx2 + nx + -8 = 0

Reorder the terms:
-8 + mx2 + nx + x3 = 0

Solving
-8 + mx2 + nx + x3 = 0

Solving for variable 'm'.

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

Add '8' to each side of the equation.
-8 + mx2 + nx + 8 + x3 = 0 + 8

Reorder the terms:
-8 + 8 + mx2 + nx + x3 = 0 + 8

Combine like terms: -8 + 8 = 0
0 + mx2 + nx + x3 = 0 + 8
mx2 + nx + x3 = 0 + 8

Combine like terms: 0 + 8 = 8
mx2 + nx + x3 = 8

Add '-1nx' to each side of the equation.
mx2 + nx + -1nx + x3 = 8 + -1nx

Combine like terms: nx + -1nx = 0
mx2 + 0 + x3 = 8 + -1nx
mx2 + x3 = 8 + -1nx

Add '-1x3' to each side of the equation.
mx2 + x3 + -1x3 = 8 + -1nx + -1x3

Combine like terms: x3 + -1x3 = 0
mx2 + 0 = 8 + -1nx + -1x3
mx2 = 8 + -1nx + -1x3

Divide each side by 'x2'.
m = 8x-2 + -1nx-1 + -1x

Simplifying
m = 8x-2 + -1nx-1 + -1x

Reorder the terms:
m = -1nx-1 + 8x-2 + -1x

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