X^4-x^3+7x^2-9x-18=0

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Solution for X^4-x^3+7x^2-9x-18=0 equation:


Simplifying
X4 + -1x3 + 7x2 + -9x + -18 = 0

Reorder the terms:
-18 + X4 + -9x + 7x2 + -1x3 = 0

Solving
-18 + X4 + -9x + 7x2 + -1x3 = 0

Solving for variable 'X'.

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

Add '18' to each side of the equation.
-18 + X4 + -9x + 7x2 + 18 + -1x3 = 0 + 18

Reorder the terms:
-18 + 18 + X4 + -9x + 7x2 + -1x3 = 0 + 18

Combine like terms: -18 + 18 = 0
0 + X4 + -9x + 7x2 + -1x3 = 0 + 18
X4 + -9x + 7x2 + -1x3 = 0 + 18

Combine like terms: 0 + 18 = 18
X4 + -9x + 7x2 + -1x3 = 18

Add '9x' to each side of the equation.
X4 + -9x + 7x2 + 9x + -1x3 = 18 + 9x

Reorder the terms:
X4 + -9x + 9x + 7x2 + -1x3 = 18 + 9x

Combine like terms: -9x + 9x = 0
X4 + 0 + 7x2 + -1x3 = 18 + 9x
X4 + 7x2 + -1x3 = 18 + 9x

Add '-7x2' to each side of the equation.
X4 + 7x2 + -7x2 + -1x3 = 18 + 9x + -7x2

Combine like terms: 7x2 + -7x2 = 0
X4 + 0 + -1x3 = 18 + 9x + -7x2
X4 + -1x3 = 18 + 9x + -7x2

Add 'x3' to each side of the equation.
X4 + -1x3 + x3 = 18 + 9x + -7x2 + x3

Combine like terms: -1x3 + x3 = 0
X4 + 0 = 18 + 9x + -7x2 + x3
X4 = 18 + 9x + -7x2 + x3

Simplifying
X4 = 18 + 9x + -7x2 + x3

Reorder the terms:
-18 + X4 + -9x + 7x2 + -1x3 = 18 + 9x + -7x2 + x3 + -18 + -9x + 7x2 + -1x3

Reorder the terms:
-18 + X4 + -9x + 7x2 + -1x3 = 18 + -18 + 9x + -9x + -7x2 + 7x2 + x3 + -1x3

Combine like terms: 18 + -18 = 0
-18 + X4 + -9x + 7x2 + -1x3 = 0 + 9x + -9x + -7x2 + 7x2 + x3 + -1x3
-18 + X4 + -9x + 7x2 + -1x3 = 9x + -9x + -7x2 + 7x2 + x3 + -1x3

Combine like terms: 9x + -9x = 0
-18 + X4 + -9x + 7x2 + -1x3 = 0 + -7x2 + 7x2 + x3 + -1x3
-18 + X4 + -9x + 7x2 + -1x3 = -7x2 + 7x2 + x3 + -1x3

Combine like terms: -7x2 + 7x2 = 0
-18 + X4 + -9x + 7x2 + -1x3 = 0 + x3 + -1x3
-18 + X4 + -9x + 7x2 + -1x3 = x3 + -1x3

Combine like terms: x3 + -1x3 = 0
-18 + X4 + -9x + 7x2 + -1x3 = 0

The solution to this equation could not be determined.

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