X^3-7x^2-3x+21=0

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Solution for X^3-7x^2-3x+21=0 equation:


Simplifying
X3 + -7x2 + -3x + 21 = 0

Reorder the terms:
21 + X3 + -3x + -7x2 = 0

Solving
21 + X3 + -3x + -7x2 = 0

Solving for variable 'X'.

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

Add '-21' to each side of the equation.
21 + X3 + -3x + -21 + -7x2 = 0 + -21

Reorder the terms:
21 + -21 + X3 + -3x + -7x2 = 0 + -21

Combine like terms: 21 + -21 = 0
0 + X3 + -3x + -7x2 = 0 + -21
X3 + -3x + -7x2 = 0 + -21

Combine like terms: 0 + -21 = -21
X3 + -3x + -7x2 = -21

Add '3x' to each side of the equation.
X3 + -3x + 3x + -7x2 = -21 + 3x

Combine like terms: -3x + 3x = 0
X3 + 0 + -7x2 = -21 + 3x
X3 + -7x2 = -21 + 3x

Add '7x2' to each side of the equation.
X3 + -7x2 + 7x2 = -21 + 3x + 7x2

Combine like terms: -7x2 + 7x2 = 0
X3 + 0 = -21 + 3x + 7x2
X3 = -21 + 3x + 7x2

Simplifying
X3 = -21 + 3x + 7x2

Reorder the terms:
21 + X3 + -3x + -7x2 = -21 + 3x + 7x2 + 21 + -3x + -7x2

Reorder the terms:
21 + X3 + -3x + -7x2 = -21 + 21 + 3x + -3x + 7x2 + -7x2

Combine like terms: -21 + 21 = 0
21 + X3 + -3x + -7x2 = 0 + 3x + -3x + 7x2 + -7x2
21 + X3 + -3x + -7x2 = 3x + -3x + 7x2 + -7x2

Combine like terms: 3x + -3x = 0
21 + X3 + -3x + -7x2 = 0 + 7x2 + -7x2
21 + X3 + -3x + -7x2 = 7x2 + -7x2

Combine like terms: 7x2 + -7x2 = 0
21 + X3 + -3x + -7x2 = 0

The solution to this equation could not be determined.

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