2u^2+5u-26-2u-2=0

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Solution for 2u^2+5u-26-2u-2=0 equation:


Simplifying
2u2 + 5u + -26 + -2u + -2 = 0

Reorder the terms:
-26 + -2 + 5u + -2u + 2u2 = 0

Combine like terms: -26 + -2 = -28
-28 + 5u + -2u + 2u2 = 0

Combine like terms: 5u + -2u = 3u
-28 + 3u + 2u2 = 0

Solving
-28 + 3u + 2u2 = 0

Solving for variable 'u'.

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

Divide each side by '2'.
-14 + 1.5u + u2 = 0

Move the constant term to the right:

Add '14' to each side of the equation.
-14 + 1.5u + 14 + u2 = 0 + 14

Reorder the terms:
-14 + 14 + 1.5u + u2 = 0 + 14

Combine like terms: -14 + 14 = 0
0 + 1.5u + u2 = 0 + 14
1.5u + u2 = 0 + 14

Combine like terms: 0 + 14 = 14
1.5u + u2 = 14

The u term is 1.5u.  Take half its coefficient (0.75).
Square it (0.5625) and add it to both sides.

Add '0.5625' to each side of the equation.
1.5u + 0.5625 + u2 = 14 + 0.5625

Reorder the terms:
0.5625 + 1.5u + u2 = 14 + 0.5625

Combine like terms: 14 + 0.5625 = 14.5625
0.5625 + 1.5u + u2 = 14.5625

Factor a perfect square on the left side:
(u + 0.75)(u + 0.75) = 14.5625

Calculate the square root of the right side: 3.816084381

Break this problem into two subproblems by setting 
(u + 0.75) equal to 3.816084381 and -3.816084381.

Subproblem 1

u + 0.75 = 3.816084381 Simplifying u + 0.75 = 3.816084381 Reorder the terms: 0.75 + u = 3.816084381 Solving 0.75 + u = 3.816084381 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-0.75' to each side of the equation. 0.75 + -0.75 + u = 3.816084381 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + u = 3.816084381 + -0.75 u = 3.816084381 + -0.75 Combine like terms: 3.816084381 + -0.75 = 3.066084381 u = 3.066084381 Simplifying u = 3.066084381

Subproblem 2

u + 0.75 = -3.816084381 Simplifying u + 0.75 = -3.816084381 Reorder the terms: 0.75 + u = -3.816084381 Solving 0.75 + u = -3.816084381 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-0.75' to each side of the equation. 0.75 + -0.75 + u = -3.816084381 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + u = -3.816084381 + -0.75 u = -3.816084381 + -0.75 Combine like terms: -3.816084381 + -0.75 = -4.566084381 u = -4.566084381 Simplifying u = -4.566084381

Solution

The solution to the problem is based on the solutions from the subproblems. u = {3.066084381, -4.566084381}

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