19a^2+36a-8=0

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Solution for 19a^2+36a-8=0 equation:


Simplifying
19a2 + 36a + -8 = 0

Reorder the terms:
-8 + 36a + 19a2 = 0

Solving
-8 + 36a + 19a2 = 0

Solving for variable 'a'.

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

Divide each side by '19'.
-0.4210526316 + 1.894736842a + a2 = 0

Move the constant term to the right:

Add '0.4210526316' to each side of the equation.
-0.4210526316 + 1.894736842a + 0.4210526316 + a2 = 0 + 0.4210526316

Reorder the terms:
-0.4210526316 + 0.4210526316 + 1.894736842a + a2 = 0 + 0.4210526316

Combine like terms: -0.4210526316 + 0.4210526316 = 0.0000000000
0.0000000000 + 1.894736842a + a2 = 0 + 0.4210526316
1.894736842a + a2 = 0 + 0.4210526316

Combine like terms: 0 + 0.4210526316 = 0.4210526316
1.894736842a + a2 = 0.4210526316

The a term is 1.894736842a.  Take half its coefficient (0.947368421).
Square it (0.8975069251) and add it to both sides.

Add '0.8975069251' to each side of the equation.
1.894736842a + 0.8975069251 + a2 = 0.4210526316 + 0.8975069251

Reorder the terms:
0.8975069251 + 1.894736842a + a2 = 0.4210526316 + 0.8975069251

Combine like terms: 0.4210526316 + 0.8975069251 = 1.3185595567
0.8975069251 + 1.894736842a + a2 = 1.3185595567

Factor a perfect square on the left side:
(a + 0.947368421)(a + 0.947368421) = 1.3185595567

Calculate the square root of the right side: 1.148285486

Break this problem into two subproblems by setting 
(a + 0.947368421) equal to 1.148285486 and -1.148285486.

Subproblem 1

a + 0.947368421 = 1.148285486 Simplifying a + 0.947368421 = 1.148285486 Reorder the terms: 0.947368421 + a = 1.148285486 Solving 0.947368421 + a = 1.148285486 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-0.947368421' to each side of the equation. 0.947368421 + -0.947368421 + a = 1.148285486 + -0.947368421 Combine like terms: 0.947368421 + -0.947368421 = 0.000000000 0.000000000 + a = 1.148285486 + -0.947368421 a = 1.148285486 + -0.947368421 Combine like terms: 1.148285486 + -0.947368421 = 0.200917065 a = 0.200917065 Simplifying a = 0.200917065

Subproblem 2

a + 0.947368421 = -1.148285486 Simplifying a + 0.947368421 = -1.148285486 Reorder the terms: 0.947368421 + a = -1.148285486 Solving 0.947368421 + a = -1.148285486 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-0.947368421' to each side of the equation. 0.947368421 + -0.947368421 + a = -1.148285486 + -0.947368421 Combine like terms: 0.947368421 + -0.947368421 = 0.000000000 0.000000000 + a = -1.148285486 + -0.947368421 a = -1.148285486 + -0.947368421 Combine like terms: -1.148285486 + -0.947368421 = -2.095653907 a = -2.095653907 Simplifying a = -2.095653907

Solution

The solution to the problem is based on the solutions from the subproblems. a = {0.200917065, -2.095653907}

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