x^4-5u^2-18=0

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Solution for x^4-5u^2-18=0 equation:


Simplifying
x4 + -5u2 + -18 = 0

Reorder the terms:
-18 + -5u2 + x4 = 0

Solving
-18 + -5u2 + x4 = 0

Solving for variable 'u'.

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

Add '18' to each side of the equation.
-18 + -5u2 + 18 + x4 = 0 + 18

Reorder the terms:
-18 + 18 + -5u2 + x4 = 0 + 18

Combine like terms: -18 + 18 = 0
0 + -5u2 + x4 = 0 + 18
-5u2 + x4 = 0 + 18

Combine like terms: 0 + 18 = 18
-5u2 + x4 = 18

Add '-1x4' to each side of the equation.
-5u2 + x4 + -1x4 = 18 + -1x4

Combine like terms: x4 + -1x4 = 0
-5u2 + 0 = 18 + -1x4
-5u2 = 18 + -1x4

Divide each side by '-5'.
u2 = -3.6 + 0.2x4

Simplifying
u2 = -3.6 + 0.2x4

Reorder the terms:
3.6 + u2 + -0.2x4 = -3.6 + 0.2x4 + 3.6 + -0.2x4

Reorder the terms:
3.6 + u2 + -0.2x4 = -3.6 + 3.6 + 0.2x4 + -0.2x4

Combine like terms: -3.6 + 3.6 = 0.0
3.6 + u2 + -0.2x4 = 0.0 + 0.2x4 + -0.2x4
3.6 + u2 + -0.2x4 = 0.2x4 + -0.2x4

Combine like terms: 0.2x4 + -0.2x4 = 0.0
3.6 + u2 + -0.2x4 = 0.0

The solution to this equation could not be determined.

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