25a^2-7a^2-18a-4+-6a+9a^2=

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Solution for 25a^2-7a^2-18a-4+-6a+9a^2= equation:


Simplifying
25a2 + -7a2 + -18a + -4 + -6a + 9a2 = 0

Reorder the terms:
-4 + -18a + -6a + 25a2 + -7a2 + 9a2 = 0

Combine like terms: -18a + -6a = -24a
-4 + -24a + 25a2 + -7a2 + 9a2 = 0

Combine like terms: 25a2 + -7a2 = 18a2
-4 + -24a + 18a2 + 9a2 = 0

Combine like terms: 18a2 + 9a2 = 27a2
-4 + -24a + 27a2 = 0

Solving
-4 + -24a + 27a2 = 0

Solving for variable 'a'.

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

Divide each side by '27'.
-0.1481481481 + -0.8888888889a + a2 = 0

Move the constant term to the right:

Add '0.1481481481' to each side of the equation.
-0.1481481481 + -0.8888888889a + 0.1481481481 + a2 = 0 + 0.1481481481

Reorder the terms:
-0.1481481481 + 0.1481481481 + -0.8888888889a + a2 = 0 + 0.1481481481

Combine like terms: -0.1481481481 + 0.1481481481 = 0.0000000000
0.0000000000 + -0.8888888889a + a2 = 0 + 0.1481481481
-0.8888888889a + a2 = 0 + 0.1481481481

Combine like terms: 0 + 0.1481481481 = 0.1481481481
-0.8888888889a + a2 = 0.1481481481

The a term is -0.8888888889a.  Take half its coefficient (-0.4444444445).
Square it (0.1975308642) and add it to both sides.

Add '0.1975308642' to each side of the equation.
-0.8888888889a + 0.1975308642 + a2 = 0.1481481481 + 0.1975308642

Reorder the terms:
0.1975308642 + -0.8888888889a + a2 = 0.1481481481 + 0.1975308642

Combine like terms: 0.1481481481 + 0.1975308642 = 0.3456790123
0.1975308642 + -0.8888888889a + a2 = 0.3456790123

Factor a perfect square on the left side:
(a + -0.4444444445)(a + -0.4444444445) = 0.3456790123

Calculate the square root of the right side: 0.587944736

Break this problem into two subproblems by setting 
(a + -0.4444444445) equal to 0.587944736 and -0.587944736.

Subproblem 1

a + -0.4444444445 = 0.587944736 Simplifying a + -0.4444444445 = 0.587944736 Reorder the terms: -0.4444444445 + a = 0.587944736 Solving -0.4444444445 + a = 0.587944736 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '0.4444444445' to each side of the equation. -0.4444444445 + 0.4444444445 + a = 0.587944736 + 0.4444444445 Combine like terms: -0.4444444445 + 0.4444444445 = 0.0000000000 0.0000000000 + a = 0.587944736 + 0.4444444445 a = 0.587944736 + 0.4444444445 Combine like terms: 0.587944736 + 0.4444444445 = 1.0323891805 a = 1.0323891805 Simplifying a = 1.0323891805

Subproblem 2

a + -0.4444444445 = -0.587944736 Simplifying a + -0.4444444445 = -0.587944736 Reorder the terms: -0.4444444445 + a = -0.587944736 Solving -0.4444444445 + a = -0.587944736 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '0.4444444445' to each side of the equation. -0.4444444445 + 0.4444444445 + a = -0.587944736 + 0.4444444445 Combine like terms: -0.4444444445 + 0.4444444445 = 0.0000000000 0.0000000000 + a = -0.587944736 + 0.4444444445 a = -0.587944736 + 0.4444444445 Combine like terms: -0.587944736 + 0.4444444445 = -0.1435002915 a = -0.1435002915 Simplifying a = -0.1435002915

Solution

The solution to the problem is based on the solutions from the subproblems. a = {1.0323891805, -0.1435002915}

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