(u^2)+25=2u^2-8u+1

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Solution for (u^2)+25=2u^2-8u+1 equation:


Simplifying
(u2) + 25 = 2u2 + -8u + 1
u2 + 25 = 2u2 + -8u + 1

Reorder the terms:
25 + u2 = 2u2 + -8u + 1

Reorder the terms:
25 + u2 = 1 + -8u + 2u2

Solving
25 + u2 = 1 + -8u + 2u2

Solving for variable 'u'.

Reorder the terms:
25 + -1 + 8u + u2 + -2u2 = 1 + -8u + 2u2 + -1 + 8u + -2u2

Combine like terms: 25 + -1 = 24
24 + 8u + u2 + -2u2 = 1 + -8u + 2u2 + -1 + 8u + -2u2

Combine like terms: u2 + -2u2 = -1u2
24 + 8u + -1u2 = 1 + -8u + 2u2 + -1 + 8u + -2u2

Reorder the terms:
24 + 8u + -1u2 = 1 + -1 + -8u + 8u + 2u2 + -2u2

Combine like terms: 1 + -1 = 0
24 + 8u + -1u2 = 0 + -8u + 8u + 2u2 + -2u2
24 + 8u + -1u2 = -8u + 8u + 2u2 + -2u2

Combine like terms: -8u + 8u = 0
24 + 8u + -1u2 = 0 + 2u2 + -2u2
24 + 8u + -1u2 = 2u2 + -2u2

Combine like terms: 2u2 + -2u2 = 0
24 + 8u + -1u2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-24 + -8u + u2 = 0

Move the constant term to the right:

Add '24' to each side of the equation.
-24 + -8u + 24 + u2 = 0 + 24

Reorder the terms:
-24 + 24 + -8u + u2 = 0 + 24

Combine like terms: -24 + 24 = 0
0 + -8u + u2 = 0 + 24
-8u + u2 = 0 + 24

Combine like terms: 0 + 24 = 24
-8u + u2 = 24

The u term is -8u.  Take half its coefficient (-4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
-8u + 16 + u2 = 24 + 16

Reorder the terms:
16 + -8u + u2 = 24 + 16

Combine like terms: 24 + 16 = 40
16 + -8u + u2 = 40

Factor a perfect square on the left side:
(u + -4)(u + -4) = 40

Calculate the square root of the right side: 6.32455532

Break this problem into two subproblems by setting 
(u + -4) equal to 6.32455532 and -6.32455532.

Subproblem 1

u + -4 = 6.32455532 Simplifying u + -4 = 6.32455532 Reorder the terms: -4 + u = 6.32455532 Solving -4 + u = 6.32455532 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + u = 6.32455532 + 4 Combine like terms: -4 + 4 = 0 0 + u = 6.32455532 + 4 u = 6.32455532 + 4 Combine like terms: 6.32455532 + 4 = 10.32455532 u = 10.32455532 Simplifying u = 10.32455532

Subproblem 2

u + -4 = -6.32455532 Simplifying u + -4 = -6.32455532 Reorder the terms: -4 + u = -6.32455532 Solving -4 + u = -6.32455532 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + u = -6.32455532 + 4 Combine like terms: -4 + 4 = 0 0 + u = -6.32455532 + 4 u = -6.32455532 + 4 Combine like terms: -6.32455532 + 4 = -2.32455532 u = -2.32455532 Simplifying u = -2.32455532

Solution

The solution to the problem is based on the solutions from the subproblems. u = {10.32455532, -2.32455532}

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