2a^2-a-288=0

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Solution for 2a^2-a-288=0 equation:


Simplifying
2a2 + -1a + -288 = 0

Reorder the terms:
-288 + -1a + 2a2 = 0

Solving
-288 + -1a + 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'.
-144 + -0.5a + a2 = 0

Move the constant term to the right:

Add '144' to each side of the equation.
-144 + -0.5a + 144 + a2 = 0 + 144

Reorder the terms:
-144 + 144 + -0.5a + a2 = 0 + 144

Combine like terms: -144 + 144 = 0
0 + -0.5a + a2 = 0 + 144
-0.5a + a2 = 0 + 144

Combine like terms: 0 + 144 = 144
-0.5a + a2 = 144

The a term is -0.5a.  Take half its coefficient (-0.25).
Square it (0.0625) and add it to both sides.

Add '0.0625' to each side of the equation.
-0.5a + 0.0625 + a2 = 144 + 0.0625

Reorder the terms:
0.0625 + -0.5a + a2 = 144 + 0.0625

Combine like terms: 144 + 0.0625 = 144.0625
0.0625 + -0.5a + a2 = 144.0625

Factor a perfect square on the left side:
(a + -0.25)(a + -0.25) = 144.0625

Calculate the square root of the right side: 12.002603884

Break this problem into two subproblems by setting 
(a + -0.25) equal to 12.002603884 and -12.002603884.

Subproblem 1

a + -0.25 = 12.002603884 Simplifying a + -0.25 = 12.002603884 Reorder the terms: -0.25 + a = 12.002603884 Solving -0.25 + a = 12.002603884 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + a = 12.002603884 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + a = 12.002603884 + 0.25 a = 12.002603884 + 0.25 Combine like terms: 12.002603884 + 0.25 = 12.252603884 a = 12.252603884 Simplifying a = 12.252603884

Subproblem 2

a + -0.25 = -12.002603884 Simplifying a + -0.25 = -12.002603884 Reorder the terms: -0.25 + a = -12.002603884 Solving -0.25 + a = -12.002603884 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + a = -12.002603884 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + a = -12.002603884 + 0.25 a = -12.002603884 + 0.25 Combine like terms: -12.002603884 + 0.25 = -11.752603884 a = -11.752603884 Simplifying a = -11.752603884

Solution

The solution to the problem is based on the solutions from the subproblems. a = {12.252603884, -11.752603884}

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