(2a^2)-2a-3=0

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Solution for (2a^2)-2a-3=0 equation:


Simplifying
(2a2) + -2a + -3 = 0

Reorder the terms:
-3 + -2a + (2a2) = 0

Solving
-3 + -2a + (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'.
-1.5 + -1a + a2 = 0

Move the constant term to the right:

Add '1.5' to each side of the equation.
-1.5 + -1a + 1.5 + a2 = 0 + 1.5

Reorder the terms:
-1.5 + 1.5 + -1a + a2 = 0 + 1.5

Combine like terms: -1.5 + 1.5 = 0.0
0.0 + -1a + a2 = 0 + 1.5
-1a + a2 = 0 + 1.5

Combine like terms: 0 + 1.5 = 1.5
-1a + a2 = 1.5

The a term is -1a.  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.
-1a + 0.25 + a2 = 1.5 + 0.25

Reorder the terms:
0.25 + -1a + a2 = 1.5 + 0.25

Combine like terms: 1.5 + 0.25 = 1.75
0.25 + -1a + a2 = 1.75

Factor a perfect square on the left side:
((a) + -0.5)((a) + -0.5) = 1.75

Calculate the square root of the right side: 1.322875656

Break this problem into two subproblems by setting 
((a) + -0.5) equal to 1.322875656 and -1.322875656.

Subproblem 1

(a) + -0.5 = 1.322875656 Simplifying (a) + -0.5 = 1.322875656 a + -0.5 = 1.322875656 Reorder the terms: -0.5 + a = 1.322875656 Solving -0.5 + a = 1.322875656 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 = 1.322875656 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + a = 1.322875656 + 0.5 a = 1.322875656 + 0.5 Combine like terms: 1.322875656 + 0.5 = 1.822875656 a = 1.822875656 Simplifying a = 1.822875656

Subproblem 2

(a) + -0.5 = -1.322875656 Simplifying (a) + -0.5 = -1.322875656 a + -0.5 = -1.322875656 Reorder the terms: -0.5 + a = -1.322875656 Solving -0.5 + a = -1.322875656 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 = -1.322875656 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + a = -1.322875656 + 0.5 a = -1.322875656 + 0.5 Combine like terms: -1.322875656 + 0.5 = -0.822875656 a = -0.822875656 Simplifying a = -0.822875656

Solution

The solution to the problem is based on the solutions from the subproblems. a = {1.822875656, -0.822875656}

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