x^4-134x^2+125=0

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Solution for x^4-134x^2+125=0 equation:


Simplifying
x4 + -134x2 + 125 = 0

Reorder the terms:
125 + -134x2 + x4 = 0

Solving
125 + -134x2 + x4 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-125' to each side of the equation.
125 + -134x2 + -125 + x4 = 0 + -125

Reorder the terms:
125 + -125 + -134x2 + x4 = 0 + -125

Combine like terms: 125 + -125 = 0
0 + -134x2 + x4 = 0 + -125
-134x2 + x4 = 0 + -125

Combine like terms: 0 + -125 = -125
-134x2 + x4 = -125

The x term is -134x2.  Take half its coefficient (-67).
Square it (4489) and add it to both sides.

Add '4489' to each side of the equation.
-134x2 + 4489 + x4 = -125 + 4489

Reorder the terms:
4489 + -134x2 + x4 = -125 + 4489

Combine like terms: -125 + 4489 = 4364
4489 + -134x2 + x4 = 4364

Factor a perfect square on the left side:
(x2 + -67)(x2 + -67) = 4364

Calculate the square root of the right side: 66.06057826

Break this problem into two subproblems by setting 
(x2 + -67) equal to 66.06057826 and -66.06057826.

Subproblem 1

x2 + -67 = 66.06057826 Simplifying x2 + -67 = 66.06057826 Reorder the terms: -67 + x2 = 66.06057826 Solving -67 + x2 = 66.06057826 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '67' to each side of the equation. -67 + 67 + x2 = 66.06057826 + 67 Combine like terms: -67 + 67 = 0 0 + x2 = 66.06057826 + 67 x2 = 66.06057826 + 67 Combine like terms: 66.06057826 + 67 = 133.06057826 x2 = 133.06057826 Simplifying x2 = 133.06057826 Take the square root of each side: x = {-11.535188696, 11.535188696}

Subproblem 2

x2 + -67 = -66.06057826 Simplifying x2 + -67 = -66.06057826 Reorder the terms: -67 + x2 = -66.06057826 Solving -67 + x2 = -66.06057826 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '67' to each side of the equation. -67 + 67 + x2 = -66.06057826 + 67 Combine like terms: -67 + 67 = 0 0 + x2 = -66.06057826 + 67 x2 = -66.06057826 + 67 Combine like terms: -66.06057826 + 67 = 0.93942174 x2 = 0.93942174 Simplifying x2 = 0.93942174 Take the square root of each side: x = {-0.969237711, 0.969237711}

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-11.535188696, 11.535188696, -0.969237711, 0.969237711}

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