x^4=34x^2-25

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Solution for x^4=34x^2-25 equation:


Simplifying
x4 = 34x2 + -25

Reorder the terms:
x4 = -25 + 34x2

Solving
x4 = -25 + 34x2

Solving for variable 'x'.

Reorder the terms:
25 + -34x2 + x4 = -25 + 34x2 + 25 + -34x2

Reorder the terms:
25 + -34x2 + x4 = -25 + 25 + 34x2 + -34x2

Combine like terms: -25 + 25 = 0
25 + -34x2 + x4 = 0 + 34x2 + -34x2
25 + -34x2 + x4 = 34x2 + -34x2

Combine like terms: 34x2 + -34x2 = 0
25 + -34x2 + x4 = 0

Begin completing the square.

Move the constant term to the right:

Add '-25' to each side of the equation.
25 + -34x2 + -25 + x4 = 0 + -25

Reorder the terms:
25 + -25 + -34x2 + x4 = 0 + -25

Combine like terms: 25 + -25 = 0
0 + -34x2 + x4 = 0 + -25
-34x2 + x4 = 0 + -25

Combine like terms: 0 + -25 = -25
-34x2 + x4 = -25

The x term is -34x2.  Take half its coefficient (-17).
Square it (289) and add it to both sides.

Add '289' to each side of the equation.
-34x2 + 289 + x4 = -25 + 289

Reorder the terms:
289 + -34x2 + x4 = -25 + 289

Combine like terms: -25 + 289 = 264
289 + -34x2 + x4 = 264

Factor a perfect square on the left side:
(x2 + -17)(x2 + -17) = 264

Calculate the square root of the right side: 16.248076809

Break this problem into two subproblems by setting 
(x2 + -17) equal to 16.248076809 and -16.248076809.

Subproblem 1

x2 + -17 = 16.248076809 Simplifying x2 + -17 = 16.248076809 Reorder the terms: -17 + x2 = 16.248076809 Solving -17 + x2 = 16.248076809 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '17' to each side of the equation. -17 + 17 + x2 = 16.248076809 + 17 Combine like terms: -17 + 17 = 0 0 + x2 = 16.248076809 + 17 x2 = 16.248076809 + 17 Combine like terms: 16.248076809 + 17 = 33.248076809 x2 = 33.248076809 Simplifying x2 = 33.248076809 Take the square root of each side: x = {-5.766114533, 5.766114533}

Subproblem 2

x2 + -17 = -16.248076809 Simplifying x2 + -17 = -16.248076809 Reorder the terms: -17 + x2 = -16.248076809 Solving -17 + x2 = -16.248076809 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '17' to each side of the equation. -17 + 17 + x2 = -16.248076809 + 17 Combine like terms: -17 + 17 = 0 0 + x2 = -16.248076809 + 17 x2 = -16.248076809 + 17 Combine like terms: -16.248076809 + 17 = 0.751923191 x2 = 0.751923191 Simplifying x2 = 0.751923191 Take the square root of each side: x = {-0.867135048, 0.867135048}

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-5.766114533, 5.766114533, -0.867135048, 0.867135048}

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