(a-4)+2a(a-4)-6a=

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Solution for (a-4)+2a(a-4)-6a= equation:


Simplifying
(a + -4) + 2a(a + -4) + -6a = 0

Reorder the terms:
(-4 + a) + 2a(a + -4) + -6a = 0

Remove parenthesis around (-4 + a)
-4 + a + 2a(a + -4) + -6a = 0

Reorder the terms:
-4 + a + 2a(-4 + a) + -6a = 0
-4 + a + (-4 * 2a + a * 2a) + -6a = 0
-4 + a + (-8a + 2a2) + -6a = 0

Reorder the terms:
-4 + a + -8a + -6a + 2a2 = 0

Combine like terms: a + -8a = -7a
-4 + -7a + -6a + 2a2 = 0

Combine like terms: -7a + -6a = -13a
-4 + -13a + 2a2 = 0

Solving
-4 + -13a + 2a2 = 0

Solving for variable 'a'.

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

Divide each side by '2'.
-2 + -6.5a + a2 = 0

Move the constant term to the right:

Add '2' to each side of the equation.
-2 + -6.5a + 2 + a2 = 0 + 2

Reorder the terms:
-2 + 2 + -6.5a + a2 = 0 + 2

Combine like terms: -2 + 2 = 0
0 + -6.5a + a2 = 0 + 2
-6.5a + a2 = 0 + 2

Combine like terms: 0 + 2 = 2
-6.5a + a2 = 2

The a term is -6.5a.  Take half its coefficient (-3.25).
Square it (10.5625) and add it to both sides.

Add '10.5625' to each side of the equation.
-6.5a + 10.5625 + a2 = 2 + 10.5625

Reorder the terms:
10.5625 + -6.5a + a2 = 2 + 10.5625

Combine like terms: 2 + 10.5625 = 12.5625
10.5625 + -6.5a + a2 = 12.5625

Factor a perfect square on the left side:
(a + -3.25)(a + -3.25) = 12.5625

Calculate the square root of the right side: 3.54436172

Break this problem into two subproblems by setting 
(a + -3.25) equal to 3.54436172 and -3.54436172.

Subproblem 1

a + -3.25 = 3.54436172 Simplifying a + -3.25 = 3.54436172 Reorder the terms: -3.25 + a = 3.54436172 Solving -3.25 + a = 3.54436172 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '3.25' to each side of the equation. -3.25 + 3.25 + a = 3.54436172 + 3.25 Combine like terms: -3.25 + 3.25 = 0.00 0.00 + a = 3.54436172 + 3.25 a = 3.54436172 + 3.25 Combine like terms: 3.54436172 + 3.25 = 6.79436172 a = 6.79436172 Simplifying a = 6.79436172

Subproblem 2

a + -3.25 = -3.54436172 Simplifying a + -3.25 = -3.54436172 Reorder the terms: -3.25 + a = -3.54436172 Solving -3.25 + a = -3.54436172 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '3.25' to each side of the equation. -3.25 + 3.25 + a = -3.54436172 + 3.25 Combine like terms: -3.25 + 3.25 = 0.00 0.00 + a = -3.54436172 + 3.25 a = -3.54436172 + 3.25 Combine like terms: -3.54436172 + 3.25 = -0.29436172 a = -0.29436172 Simplifying a = -0.29436172

Solution

The solution to the problem is based on the solutions from the subproblems. a = {6.79436172, -0.29436172}

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