x^4+6x^2-1.75=0

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Solution for x^4+6x^2-1.75=0 equation:


Simplifying
x4 + 6x2 + -1.75 = 0

Reorder the terms:
-1.75 + 6x2 + x4 = 0

Solving
-1.75 + 6x2 + x4 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '1.75' to each side of the equation.
-1.75 + 6x2 + 1.75 + x4 = 0 + 1.75

Reorder the terms:
-1.75 + 1.75 + 6x2 + x4 = 0 + 1.75

Combine like terms: -1.75 + 1.75 = 0.00
0.00 + 6x2 + x4 = 0 + 1.75
6x2 + x4 = 0 + 1.75

Combine like terms: 0 + 1.75 = 1.75
6x2 + x4 = 1.75

The x term is 6x2.  Take half its coefficient (3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
6x2 + 9 + x4 = 1.75 + 9

Reorder the terms:
9 + 6x2 + x4 = 1.75 + 9

Combine like terms: 1.75 + 9 = 10.75
9 + 6x2 + x4 = 10.75

Factor a perfect square on the left side:
(x2 + 3)(x2 + 3) = 10.75

Calculate the square root of the right side: 3.278719262

Break this problem into two subproblems by setting 
(x2 + 3) equal to 3.278719262 and -3.278719262.

Subproblem 1

x2 + 3 = 3.278719262 Simplifying x2 + 3 = 3.278719262 Reorder the terms: 3 + x2 = 3.278719262 Solving 3 + x2 = 3.278719262 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x2 = 3.278719262 + -3 Combine like terms: 3 + -3 = 0 0 + x2 = 3.278719262 + -3 x2 = 3.278719262 + -3 Combine like terms: 3.278719262 + -3 = 0.278719262 x2 = 0.278719262 Simplifying x2 = 0.278719262 Take the square root of each side: x = {-0.527938692, 0.527938692}

Subproblem 2

x2 + 3 = -3.278719262 Simplifying x2 + 3 = -3.278719262 Reorder the terms: 3 + x2 = -3.278719262 Solving 3 + x2 = -3.278719262 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x2 = -3.278719262 + -3 Combine like terms: 3 + -3 = 0 0 + x2 = -3.278719262 + -3 x2 = -3.278719262 + -3 Combine like terms: -3.278719262 + -3 = -6.278719262 x2 = -6.278719262 Simplifying x2 = -6.278719262 Reorder the terms: 6.278719262 + x2 = -6.278719262 + 6.278719262 Combine like terms: -6.278719262 + 6.278719262 = 0.000000000 6.278719262 + x2 = 0.000000000 The solution to this equation could not be determined.This subproblem is being ignored because a solution could not be determined. The solution to this equation could not be determined.

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