19a^2-10a-10=0

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Solution for 19a^2-10a-10=0 equation:


Simplifying
19a2 + -10a + -10 = 0

Reorder the terms:
-10 + -10a + 19a2 = 0

Solving
-10 + -10a + 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'.
-0.5263157895 + -0.5263157895a + a2 = 0

Move the constant term to the right:

Add '0.5263157895' to each side of the equation.
-0.5263157895 + -0.5263157895a + 0.5263157895 + a2 = 0 + 0.5263157895

Reorder the terms:
-0.5263157895 + 0.5263157895 + -0.5263157895a + a2 = 0 + 0.5263157895

Combine like terms: -0.5263157895 + 0.5263157895 = 0.0000000000
0.0000000000 + -0.5263157895a + a2 = 0 + 0.5263157895
-0.5263157895a + a2 = 0 + 0.5263157895

Combine like terms: 0 + 0.5263157895 = 0.5263157895
-0.5263157895a + a2 = 0.5263157895

The a term is -0.5263157895a.  Take half its coefficient (-0.2631578948).
Square it (0.06925207760) and add it to both sides.

Add '0.06925207760' to each side of the equation.
-0.5263157895a + 0.06925207760 + a2 = 0.5263157895 + 0.06925207760

Reorder the terms:
0.06925207760 + -0.5263157895a + a2 = 0.5263157895 + 0.06925207760

Combine like terms: 0.5263157895 + 0.06925207760 = 0.5955678671
0.06925207760 + -0.5263157895a + a2 = 0.5955678671

Factor a perfect square on the left side:
(a + -0.2631578948)(a + -0.2631578948) = 0.5955678671

Calculate the square root of the right side: 0.771730437

Break this problem into two subproblems by setting 
(a + -0.2631578948) equal to 0.771730437 and -0.771730437.

Subproblem 1

a + -0.2631578948 = 0.771730437 Simplifying a + -0.2631578948 = 0.771730437 Reorder the terms: -0.2631578948 + a = 0.771730437 Solving -0.2631578948 + a = 0.771730437 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '0.2631578948' to each side of the equation. -0.2631578948 + 0.2631578948 + a = 0.771730437 + 0.2631578948 Combine like terms: -0.2631578948 + 0.2631578948 = 0.0000000000 0.0000000000 + a = 0.771730437 + 0.2631578948 a = 0.771730437 + 0.2631578948 Combine like terms: 0.771730437 + 0.2631578948 = 1.0348883318 a = 1.0348883318 Simplifying a = 1.0348883318

Subproblem 2

a + -0.2631578948 = -0.771730437 Simplifying a + -0.2631578948 = -0.771730437 Reorder the terms: -0.2631578948 + a = -0.771730437 Solving -0.2631578948 + a = -0.771730437 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '0.2631578948' to each side of the equation. -0.2631578948 + 0.2631578948 + a = -0.771730437 + 0.2631578948 Combine like terms: -0.2631578948 + 0.2631578948 = 0.0000000000 0.0000000000 + a = -0.771730437 + 0.2631578948 a = -0.771730437 + 0.2631578948 Combine like terms: -0.771730437 + 0.2631578948 = -0.5085725422 a = -0.5085725422 Simplifying a = -0.5085725422

Solution

The solution to the problem is based on the solutions from the subproblems. a = {1.0348883318, -0.5085725422}

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