u^2+19u-46=0

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Solution for u^2+19u-46=0 equation:


Simplifying
u2 + 19u + -46 = 0

Reorder the terms:
-46 + 19u + u2 = 0

Solving
-46 + 19u + u2 = 0

Solving for variable 'u'.

Begin completing the square.

Move the constant term to the right:

Add '46' to each side of the equation.
-46 + 19u + 46 + u2 = 0 + 46

Reorder the terms:
-46 + 46 + 19u + u2 = 0 + 46

Combine like terms: -46 + 46 = 0
0 + 19u + u2 = 0 + 46
19u + u2 = 0 + 46

Combine like terms: 0 + 46 = 46
19u + u2 = 46

The u term is 19u.  Take half its coefficient (9.5).
Square it (90.25) and add it to both sides.

Add '90.25' to each side of the equation.
19u + 90.25 + u2 = 46 + 90.25

Reorder the terms:
90.25 + 19u + u2 = 46 + 90.25

Combine like terms: 46 + 90.25 = 136.25
90.25 + 19u + u2 = 136.25

Factor a perfect square on the left side:
(u + 9.5)(u + 9.5) = 136.25

Calculate the square root of the right side: 11.67261753

Break this problem into two subproblems by setting 
(u + 9.5) equal to 11.67261753 and -11.67261753.

Subproblem 1

u + 9.5 = 11.67261753 Simplifying u + 9.5 = 11.67261753 Reorder the terms: 9.5 + u = 11.67261753 Solving 9.5 + u = 11.67261753 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-9.5' to each side of the equation. 9.5 + -9.5 + u = 11.67261753 + -9.5 Combine like terms: 9.5 + -9.5 = 0.0 0.0 + u = 11.67261753 + -9.5 u = 11.67261753 + -9.5 Combine like terms: 11.67261753 + -9.5 = 2.17261753 u = 2.17261753 Simplifying u = 2.17261753

Subproblem 2

u + 9.5 = -11.67261753 Simplifying u + 9.5 = -11.67261753 Reorder the terms: 9.5 + u = -11.67261753 Solving 9.5 + u = -11.67261753 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-9.5' to each side of the equation. 9.5 + -9.5 + u = -11.67261753 + -9.5 Combine like terms: 9.5 + -9.5 = 0.0 0.0 + u = -11.67261753 + -9.5 u = -11.67261753 + -9.5 Combine like terms: -11.67261753 + -9.5 = -21.17261753 u = -21.17261753 Simplifying u = -21.17261753

Solution

The solution to the problem is based on the solutions from the subproblems. u = {2.17261753, -21.17261753}

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