X^3+7x^2-20x-140=0

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Solution for X^3+7x^2-20x-140=0 equation:


Simplifying
X3 + 7x2 + -20x + -140 = 0

Reorder the terms:
-140 + X3 + -20x + 7x2 = 0

Solving
-140 + X3 + -20x + 7x2 = 0

Solving for variable 'X'.

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

Add '140' to each side of the equation.
-140 + X3 + -20x + 140 + 7x2 = 0 + 140

Reorder the terms:
-140 + 140 + X3 + -20x + 7x2 = 0 + 140

Combine like terms: -140 + 140 = 0
0 + X3 + -20x + 7x2 = 0 + 140
X3 + -20x + 7x2 = 0 + 140

Combine like terms: 0 + 140 = 140
X3 + -20x + 7x2 = 140

Add '20x' to each side of the equation.
X3 + -20x + 20x + 7x2 = 140 + 20x

Combine like terms: -20x + 20x = 0
X3 + 0 + 7x2 = 140 + 20x
X3 + 7x2 = 140 + 20x

Add '-7x2' to each side of the equation.
X3 + 7x2 + -7x2 = 140 + 20x + -7x2

Combine like terms: 7x2 + -7x2 = 0
X3 + 0 = 140 + 20x + -7x2
X3 = 140 + 20x + -7x2

Simplifying
X3 = 140 + 20x + -7x2

Reorder the terms:
-140 + X3 + -20x + 7x2 = 140 + 20x + -7x2 + -140 + -20x + 7x2

Reorder the terms:
-140 + X3 + -20x + 7x2 = 140 + -140 + 20x + -20x + -7x2 + 7x2

Combine like terms: 140 + -140 = 0
-140 + X3 + -20x + 7x2 = 0 + 20x + -20x + -7x2 + 7x2
-140 + X3 + -20x + 7x2 = 20x + -20x + -7x2 + 7x2

Combine like terms: 20x + -20x = 0
-140 + X3 + -20x + 7x2 = 0 + -7x2 + 7x2
-140 + X3 + -20x + 7x2 = -7x2 + 7x2

Combine like terms: -7x2 + 7x2 = 0
-140 + X3 + -20x + 7x2 = 0

The solution to this equation could not be determined.

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