6u^2=2u^2+16u+15

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Solution for 6u^2=2u^2+16u+15 equation:


Simplifying
6u2 = 2u2 + 16u + 15

Reorder the terms:
6u2 = 15 + 16u + 2u2

Solving
6u2 = 15 + 16u + 2u2

Solving for variable 'u'.

Reorder the terms:
-15 + -16u + 6u2 + -2u2 = 15 + 16u + 2u2 + -15 + -16u + -2u2

Combine like terms: 6u2 + -2u2 = 4u2
-15 + -16u + 4u2 = 15 + 16u + 2u2 + -15 + -16u + -2u2

Reorder the terms:
-15 + -16u + 4u2 = 15 + -15 + 16u + -16u + 2u2 + -2u2

Combine like terms: 15 + -15 = 0
-15 + -16u + 4u2 = 0 + 16u + -16u + 2u2 + -2u2
-15 + -16u + 4u2 = 16u + -16u + 2u2 + -2u2

Combine like terms: 16u + -16u = 0
-15 + -16u + 4u2 = 0 + 2u2 + -2u2
-15 + -16u + 4u2 = 2u2 + -2u2

Combine like terms: 2u2 + -2u2 = 0
-15 + -16u + 4u2 = 0

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

Divide each side by '4'.
-3.75 + -4u + u2 = 0

Move the constant term to the right:

Add '3.75' to each side of the equation.
-3.75 + -4u + 3.75 + u2 = 0 + 3.75

Reorder the terms:
-3.75 + 3.75 + -4u + u2 = 0 + 3.75

Combine like terms: -3.75 + 3.75 = 0.00
0.00 + -4u + u2 = 0 + 3.75
-4u + u2 = 0 + 3.75

Combine like terms: 0 + 3.75 = 3.75
-4u + u2 = 3.75

The u term is -4u.  Take half its coefficient (-2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
-4u + 4 + u2 = 3.75 + 4

Reorder the terms:
4 + -4u + u2 = 3.75 + 4

Combine like terms: 3.75 + 4 = 7.75
4 + -4u + u2 = 7.75

Factor a perfect square on the left side:
(u + -2)(u + -2) = 7.75

Calculate the square root of the right side: 2.783882181

Break this problem into two subproblems by setting 
(u + -2) equal to 2.783882181 and -2.783882181.

Subproblem 1

u + -2 = 2.783882181 Simplifying u + -2 = 2.783882181 Reorder the terms: -2 + u = 2.783882181 Solving -2 + u = 2.783882181 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + u = 2.783882181 + 2 Combine like terms: -2 + 2 = 0 0 + u = 2.783882181 + 2 u = 2.783882181 + 2 Combine like terms: 2.783882181 + 2 = 4.783882181 u = 4.783882181 Simplifying u = 4.783882181

Subproblem 2

u + -2 = -2.783882181 Simplifying u + -2 = -2.783882181 Reorder the terms: -2 + u = -2.783882181 Solving -2 + u = -2.783882181 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + u = -2.783882181 + 2 Combine like terms: -2 + 2 = 0 0 + u = -2.783882181 + 2 u = -2.783882181 + 2 Combine like terms: -2.783882181 + 2 = -0.783882181 u = -0.783882181 Simplifying u = -0.783882181

Solution

The solution to the problem is based on the solutions from the subproblems. u = {4.783882181, -0.783882181}

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