5r^4+10r^2+2=0

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Solution for 5r^4+10r^2+2=0 equation:


Simplifying
5r4 + 10r2 + 2 = 0

Reorder the terms:
2 + 10r2 + 5r4 = 0

Solving
2 + 10r2 + 5r4 = 0

Solving for variable 'r'.

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

Divide each side by '5'.
0.4 + 2r2 + r4 = 0

Move the constant term to the right:

Add '-0.4' to each side of the equation.
0.4 + 2r2 + -0.4 + r4 = 0 + -0.4

Reorder the terms:
0.4 + -0.4 + 2r2 + r4 = 0 + -0.4

Combine like terms: 0.4 + -0.4 = 0.0
0.0 + 2r2 + r4 = 0 + -0.4
2r2 + r4 = 0 + -0.4

Combine like terms: 0 + -0.4 = -0.4
2r2 + r4 = -0.4

The r term is 2r2.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2r2 + 1 + r4 = -0.4 + 1

Reorder the terms:
1 + 2r2 + r4 = -0.4 + 1

Combine like terms: -0.4 + 1 = 0.6
1 + 2r2 + r4 = 0.6

Factor a perfect square on the left side:
(r2 + 1)(r2 + 1) = 0.6

Calculate the square root of the right side: 0.774596669

Break this problem into two subproblems by setting 
(r2 + 1) equal to 0.774596669 and -0.774596669.

Subproblem 1

r2 + 1 = 0.774596669 Simplifying r2 + 1 = 0.774596669 Reorder the terms: 1 + r2 = 0.774596669 Solving 1 + r2 = 0.774596669 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + r2 = 0.774596669 + -1 Combine like terms: 1 + -1 = 0 0 + r2 = 0.774596669 + -1 r2 = 0.774596669 + -1 Combine like terms: 0.774596669 + -1 = -0.225403331 r2 = -0.225403331 Simplifying r2 = -0.225403331 Reorder the terms: 0.225403331 + r2 = -0.225403331 + 0.225403331 Combine like terms: -0.225403331 + 0.225403331 = 0.000000000 0.225403331 + r2 = 0.000000000 The solution to this equation could not be determined.This subproblem is being ignored because a solution could not be determined.

Subproblem 2

r2 + 1 = -0.774596669 Simplifying r2 + 1 = -0.774596669 Reorder the terms: 1 + r2 = -0.774596669 Solving 1 + r2 = -0.774596669 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + r2 = -0.774596669 + -1 Combine like terms: 1 + -1 = 0 0 + r2 = -0.774596669 + -1 r2 = -0.774596669 + -1 Combine like terms: -0.774596669 + -1 = -1.774596669 r2 = -1.774596669 Simplifying r2 = -1.774596669 Reorder the terms: 1.774596669 + r2 = -1.774596669 + 1.774596669 Combine like terms: -1.774596669 + 1.774596669 = 0.000000000 1.774596669 + r2 = 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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