a=26-3a^2

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Solution for a=26-3a^2 equation:


Simplifying
a = 26 + -3a2

Solving
a = 26 + -3a2

Solving for variable 'a'.

Reorder the terms:
-26 + a + 3a2 = 26 + -3a2 + -26 + 3a2

Reorder the terms:
-26 + a + 3a2 = 26 + -26 + -3a2 + 3a2

Combine like terms: 26 + -26 = 0
-26 + a + 3a2 = 0 + -3a2 + 3a2
-26 + a + 3a2 = -3a2 + 3a2

Combine like terms: -3a2 + 3a2 = 0
-26 + a + 3a2 = 0

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

Divide each side by '3'.
-8.666666667 + 0.3333333333a + a2 = 0

Move the constant term to the right:

Add '8.666666667' to each side of the equation.
-8.666666667 + 0.3333333333a + 8.666666667 + a2 = 0 + 8.666666667

Reorder the terms:
-8.666666667 + 8.666666667 + 0.3333333333a + a2 = 0 + 8.666666667

Combine like terms: -8.666666667 + 8.666666667 = 0.000000000
0.000000000 + 0.3333333333a + a2 = 0 + 8.666666667
0.3333333333a + a2 = 0 + 8.666666667

Combine like terms: 0 + 8.666666667 = 8.666666667
0.3333333333a + a2 = 8.666666667

The a term is a.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
0.3333333333a + 0.25 + a2 = 8.666666667 + 0.25

Reorder the terms:
0.25 + 0.3333333333a + a2 = 8.666666667 + 0.25

Combine like terms: 8.666666667 + 0.25 = 8.916666667
0.25 + 0.3333333333a + a2 = 8.916666667

Factor a perfect square on the left side:
(a + 0.5)(a + 0.5) = 8.916666667

Calculate the square root of the right side: 2.986078811

Break this problem into two subproblems by setting 
(a + 0.5) equal to 2.986078811 and -2.986078811.

Subproblem 1

a + 0.5 = 2.986078811 Simplifying a + 0.5 = 2.986078811 Reorder the terms: 0.5 + a = 2.986078811 Solving 0.5 + a = 2.986078811 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + a = 2.986078811 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + a = 2.986078811 + -0.5 a = 2.986078811 + -0.5 Combine like terms: 2.986078811 + -0.5 = 2.486078811 a = 2.486078811 Simplifying a = 2.486078811

Subproblem 2

a + 0.5 = -2.986078811 Simplifying a + 0.5 = -2.986078811 Reorder the terms: 0.5 + a = -2.986078811 Solving 0.5 + a = -2.986078811 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + a = -2.986078811 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + a = -2.986078811 + -0.5 a = -2.986078811 + -0.5 Combine like terms: -2.986078811 + -0.5 = -3.486078811 a = -3.486078811 Simplifying a = -3.486078811

Solution

The solution to the problem is based on the solutions from the subproblems. a = {2.486078811, -3.486078811}

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