(u-3)2=2u^2-8u+1

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Solution for (u-3)2=2u^2-8u+1 equation:


Simplifying
(u + -3) * 2 = 2u2 + -8u + 1

Reorder the terms:
(-3 + u) * 2 = 2u2 + -8u + 1

Reorder the terms for easier multiplication:
2(-3 + u) = 2u2 + -8u + 1
(-3 * 2 + u * 2) = 2u2 + -8u + 1
(-6 + 2u) = 2u2 + -8u + 1

Reorder the terms:
-6 + 2u = 1 + -8u + 2u2

Solving
-6 + 2u = 1 + -8u + 2u2

Solving for variable 'u'.

Reorder the terms:
-6 + -1 + 2u + 8u + -2u2 = 1 + -8u + 2u2 + -1 + 8u + -2u2

Combine like terms: -6 + -1 = -7
-7 + 2u + 8u + -2u2 = 1 + -8u + 2u2 + -1 + 8u + -2u2

Combine like terms: 2u + 8u = 10u
-7 + 10u + -2u2 = 1 + -8u + 2u2 + -1 + 8u + -2u2

Reorder the terms:
-7 + 10u + -2u2 = 1 + -1 + -8u + 8u + 2u2 + -2u2

Combine like terms: 1 + -1 = 0
-7 + 10u + -2u2 = 0 + -8u + 8u + 2u2 + -2u2
-7 + 10u + -2u2 = -8u + 8u + 2u2 + -2u2

Combine like terms: -8u + 8u = 0
-7 + 10u + -2u2 = 0 + 2u2 + -2u2
-7 + 10u + -2u2 = 2u2 + -2u2

Combine like terms: 2u2 + -2u2 = 0
-7 + 10u + -2u2 = 0

Begin completing the square.  Divide all terms by
-2 the coefficient of the squared term: 

Divide each side by '-2'.
3.5 + -5u + u2 = 0

Move the constant term to the right:

Add '-3.5' to each side of the equation.
3.5 + -5u + -3.5 + u2 = 0 + -3.5

Reorder the terms:
3.5 + -3.5 + -5u + u2 = 0 + -3.5

Combine like terms: 3.5 + -3.5 = 0.0
0.0 + -5u + u2 = 0 + -3.5
-5u + u2 = 0 + -3.5

Combine like terms: 0 + -3.5 = -3.5
-5u + u2 = -3.5

The u term is -5u.  Take half its coefficient (-2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
-5u + 6.25 + u2 = -3.5 + 6.25

Reorder the terms:
6.25 + -5u + u2 = -3.5 + 6.25

Combine like terms: -3.5 + 6.25 = 2.75
6.25 + -5u + u2 = 2.75

Factor a perfect square on the left side:
(u + -2.5)(u + -2.5) = 2.75

Calculate the square root of the right side: 1.658312395

Break this problem into two subproblems by setting 
(u + -2.5) equal to 1.658312395 and -1.658312395.

Subproblem 1

u + -2.5 = 1.658312395 Simplifying u + -2.5 = 1.658312395 Reorder the terms: -2.5 + u = 1.658312395 Solving -2.5 + u = 1.658312395 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + u = 1.658312395 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + u = 1.658312395 + 2.5 u = 1.658312395 + 2.5 Combine like terms: 1.658312395 + 2.5 = 4.158312395 u = 4.158312395 Simplifying u = 4.158312395

Subproblem 2

u + -2.5 = -1.658312395 Simplifying u + -2.5 = -1.658312395 Reorder the terms: -2.5 + u = -1.658312395 Solving -2.5 + u = -1.658312395 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + u = -1.658312395 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + u = -1.658312395 + 2.5 u = -1.658312395 + 2.5 Combine like terms: -1.658312395 + 2.5 = 0.841687605 u = 0.841687605 Simplifying u = 0.841687605

Solution

The solution to the problem is based on the solutions from the subproblems. u = {4.158312395, 0.841687605}

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