(5u^2-u-7)+(6u^2-2u+3)=

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Solution for (5u^2-u-7)+(6u^2-2u+3)= equation:


Simplifying
(5u2 + -1u + -7) + (6u2 + -2u + 3) = 0

Reorder the terms:
(-7 + -1u + 5u2) + (6u2 + -2u + 3) = 0

Remove parenthesis around (-7 + -1u + 5u2)
-7 + -1u + 5u2 + (6u2 + -2u + 3) = 0

Reorder the terms:
-7 + -1u + 5u2 + (3 + -2u + 6u2) = 0

Remove parenthesis around (3 + -2u + 6u2)
-7 + -1u + 5u2 + 3 + -2u + 6u2 = 0

Reorder the terms:
-7 + 3 + -1u + -2u + 5u2 + 6u2 = 0

Combine like terms: -7 + 3 = -4
-4 + -1u + -2u + 5u2 + 6u2 = 0

Combine like terms: -1u + -2u = -3u
-4 + -3u + 5u2 + 6u2 = 0

Combine like terms: 5u2 + 6u2 = 11u2
-4 + -3u + 11u2 = 0

Solving
-4 + -3u + 11u2 = 0

Solving for variable 'u'.

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

Divide each side by '11'.
-0.3636363636 + -0.2727272727u + u2 = 0

Move the constant term to the right:

Add '0.3636363636' to each side of the equation.
-0.3636363636 + -0.2727272727u + 0.3636363636 + u2 = 0 + 0.3636363636

Reorder the terms:
-0.3636363636 + 0.3636363636 + -0.2727272727u + u2 = 0 + 0.3636363636

Combine like terms: -0.3636363636 + 0.3636363636 = 0.0000000000
0.0000000000 + -0.2727272727u + u2 = 0 + 0.3636363636
-0.2727272727u + u2 = 0 + 0.3636363636

Combine like terms: 0 + 0.3636363636 = 0.3636363636
-0.2727272727u + u2 = 0.3636363636

The u term is -0.2727272727u.  Take half its coefficient (-0.1363636364).
Square it (0.01859504133) and add it to both sides.

Add '0.01859504133' to each side of the equation.
-0.2727272727u + 0.01859504133 + u2 = 0.3636363636 + 0.01859504133

Reorder the terms:
0.01859504133 + -0.2727272727u + u2 = 0.3636363636 + 0.01859504133

Combine like terms: 0.3636363636 + 0.01859504133 = 0.38223140493
0.01859504133 + -0.2727272727u + u2 = 0.38223140493

Factor a perfect square on the left side:
(u + -0.1363636364)(u + -0.1363636364) = 0.38223140493

Calculate the square root of the right side: 0.618248659

Break this problem into two subproblems by setting 
(u + -0.1363636364) equal to 0.618248659 and -0.618248659.

Subproblem 1

u + -0.1363636364 = 0.618248659 Simplifying u + -0.1363636364 = 0.618248659 Reorder the terms: -0.1363636364 + u = 0.618248659 Solving -0.1363636364 + u = 0.618248659 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '0.1363636364' to each side of the equation. -0.1363636364 + 0.1363636364 + u = 0.618248659 + 0.1363636364 Combine like terms: -0.1363636364 + 0.1363636364 = 0.0000000000 0.0000000000 + u = 0.618248659 + 0.1363636364 u = 0.618248659 + 0.1363636364 Combine like terms: 0.618248659 + 0.1363636364 = 0.7546122954 u = 0.7546122954 Simplifying u = 0.7546122954

Subproblem 2

u + -0.1363636364 = -0.618248659 Simplifying u + -0.1363636364 = -0.618248659 Reorder the terms: -0.1363636364 + u = -0.618248659 Solving -0.1363636364 + u = -0.618248659 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '0.1363636364' to each side of the equation. -0.1363636364 + 0.1363636364 + u = -0.618248659 + 0.1363636364 Combine like terms: -0.1363636364 + 0.1363636364 = 0.0000000000 0.0000000000 + u = -0.618248659 + 0.1363636364 u = -0.618248659 + 0.1363636364 Combine like terms: -0.618248659 + 0.1363636364 = -0.4818850226 u = -0.4818850226 Simplifying u = -0.4818850226

Solution

The solution to the problem is based on the solutions from the subproblems. u = {0.7546122954, -0.4818850226}

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