2x^3+ax^2-bx-8=0

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Solution for 2x^3+ax^2-bx-8=0 equation:


Simplifying
2x3 + ax2 + -1bx + -8 = 0

Reorder the terms:
-8 + ax2 + -1bx + 2x3 = 0

Solving
-8 + ax2 + -1bx + 2x3 = 0

Solving for variable 'a'.

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

Add '8' to each side of the equation.
-8 + ax2 + -1bx + 8 + 2x3 = 0 + 8

Reorder the terms:
-8 + 8 + ax2 + -1bx + 2x3 = 0 + 8

Combine like terms: -8 + 8 = 0
0 + ax2 + -1bx + 2x3 = 0 + 8
ax2 + -1bx + 2x3 = 0 + 8

Combine like terms: 0 + 8 = 8
ax2 + -1bx + 2x3 = 8

Add 'bx' to each side of the equation.
ax2 + -1bx + bx + 2x3 = 8 + bx

Combine like terms: -1bx + bx = 0
ax2 + 0 + 2x3 = 8 + bx
ax2 + 2x3 = 8 + bx

Add '-2x3' to each side of the equation.
ax2 + 2x3 + -2x3 = 8 + bx + -2x3

Combine like terms: 2x3 + -2x3 = 0
ax2 + 0 = 8 + bx + -2x3
ax2 = 8 + bx + -2x3

Divide each side by 'x2'.
a = 8x-2 + bx-1 + -2x

Simplifying
a = 8x-2 + bx-1 + -2x

Reorder the terms:
a = bx-1 + 8x-2 + -2x

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