4*x^2*(x^2-1)=17*x^2-25

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Solution for 4*x^2*(x^2-1)=17*x^2-25 equation:


Simplifying
4x2(x2 + -1) = 17x2 + -25

Reorder the terms:
4x2(-1 + x2) = 17x2 + -25
(-1 * 4x2 + x2 * 4x2) = 17x2 + -25
(-4x2 + 4x4) = 17x2 + -25

Reorder the terms:
-4x2 + 4x4 = -25 + 17x2

Solving
-4x2 + 4x4 = -25 + 17x2

Solving for variable 'x'.

Reorder the terms:
25 + -4x2 + -17x2 + 4x4 = -25 + 17x2 + 25 + -17x2

Combine like terms: -4x2 + -17x2 = -21x2
25 + -21x2 + 4x4 = -25 + 17x2 + 25 + -17x2

Reorder the terms:
25 + -21x2 + 4x4 = -25 + 25 + 17x2 + -17x2

Combine like terms: -25 + 25 = 0
25 + -21x2 + 4x4 = 0 + 17x2 + -17x2
25 + -21x2 + 4x4 = 17x2 + -17x2

Combine like terms: 17x2 + -17x2 = 0
25 + -21x2 + 4x4 = 0

Begin completing the square.  Divide all terms by
4 the coefficient of the squared term: 

Divide each side by '4'.
6.25 + -5.25x2 + x4 = 0

Move the constant term to the right:

Add '-6.25' to each side of the equation.
6.25 + -5.25x2 + -6.25 + x4 = 0 + -6.25

Reorder the terms:
6.25 + -6.25 + -5.25x2 + x4 = 0 + -6.25

Combine like terms: 6.25 + -6.25 = 0.00
0.00 + -5.25x2 + x4 = 0 + -6.25
-5.25x2 + x4 = 0 + -6.25

Combine like terms: 0 + -6.25 = -6.25
-5.25x2 + x4 = -6.25

The x term is -5.25x2.  Take half its coefficient (-2.625).
Square it (6.890625) and add it to both sides.

Add '6.890625' to each side of the equation.
-5.25x2 + 6.890625 + x4 = -6.25 + 6.890625

Reorder the terms:
6.890625 + -5.25x2 + x4 = -6.25 + 6.890625

Combine like terms: -6.25 + 6.890625 = 0.640625
6.890625 + -5.25x2 + x4 = 0.640625

Factor a perfect square on the left side:
(x2 + -2.625)(x2 + -2.625) = 0.640625

Calculate the square root of the right side: 0.80039053

Break this problem into two subproblems by setting 
(x2 + -2.625) equal to 0.80039053 and -0.80039053.

Subproblem 1

x2 + -2.625 = 0.80039053 Simplifying x2 + -2.625 = 0.80039053 Reorder the terms: -2.625 + x2 = 0.80039053 Solving -2.625 + x2 = 0.80039053 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.625' to each side of the equation. -2.625 + 2.625 + x2 = 0.80039053 + 2.625 Combine like terms: -2.625 + 2.625 = 0.000 0.000 + x2 = 0.80039053 + 2.625 x2 = 0.80039053 + 2.625 Combine like terms: 0.80039053 + 2.625 = 3.42539053 x2 = 3.42539053 Simplifying x2 = 3.42539053 Take the square root of each side: x = {-1.850781059, 1.850781059}

Subproblem 2

x2 + -2.625 = -0.80039053 Simplifying x2 + -2.625 = -0.80039053 Reorder the terms: -2.625 + x2 = -0.80039053 Solving -2.625 + x2 = -0.80039053 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.625' to each side of the equation. -2.625 + 2.625 + x2 = -0.80039053 + 2.625 Combine like terms: -2.625 + 2.625 = 0.000 0.000 + x2 = -0.80039053 + 2.625 x2 = -0.80039053 + 2.625 Combine like terms: -0.80039053 + 2.625 = 1.82460947 x2 = 1.82460947 Simplifying x2 = 1.82460947 Take the square root of each side: x = {-1.350781059, 1.350781059}

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-1.850781059, 1.850781059, -1.350781059, 1.350781059}

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