(2u^2-5u+6)+(-3u^2+7u+1)=

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Solution for (2u^2-5u+6)+(-3u^2+7u+1)= equation:


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

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

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

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

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

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

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

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

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

Solving
7 + 2u + -1u2 = 0

Solving for variable 'u'.

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

Divide each side by '-1'.
-7 + -2u + u2 = 0

Move the constant term to the right:

Add '7' to each side of the equation.
-7 + -2u + 7 + u2 = 0 + 7

Reorder the terms:
-7 + 7 + -2u + u2 = 0 + 7

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

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

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

Add '1' to each side of the equation.
-2u + 1 + u2 = 7 + 1

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

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

Factor a perfect square on the left side:
(u + -1)(u + -1) = 8

Calculate the square root of the right side: 2.828427125

Break this problem into two subproblems by setting 
(u + -1) equal to 2.828427125 and -2.828427125.

Subproblem 1

u + -1 = 2.828427125 Simplifying u + -1 = 2.828427125 Reorder the terms: -1 + u = 2.828427125 Solving -1 + u = 2.828427125 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + u = 2.828427125 + 1 Combine like terms: -1 + 1 = 0 0 + u = 2.828427125 + 1 u = 2.828427125 + 1 Combine like terms: 2.828427125 + 1 = 3.828427125 u = 3.828427125 Simplifying u = 3.828427125

Subproblem 2

u + -1 = -2.828427125 Simplifying u + -1 = -2.828427125 Reorder the terms: -1 + u = -2.828427125 Solving -1 + u = -2.828427125 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + u = -2.828427125 + 1 Combine like terms: -1 + 1 = 0 0 + u = -2.828427125 + 1 u = -2.828427125 + 1 Combine like terms: -2.828427125 + 1 = -1.828427125 u = -1.828427125 Simplifying u = -1.828427125

Solution

The solution to the problem is based on the solutions from the subproblems. u = {3.828427125, -1.828427125}

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