10a^2-19a-35=0

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Solution for 10a^2-19a-35=0 equation:


Simplifying
10a2 + -19a + -35 = 0

Reorder the terms:
-35 + -19a + 10a2 = 0

Solving
-35 + -19a + 10a2 = 0

Solving for variable 'a'.

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

Divide each side by '10'.
-3.5 + -1.9a + a2 = 0

Move the constant term to the right:

Add '3.5' to each side of the equation.
-3.5 + -1.9a + 3.5 + a2 = 0 + 3.5

Reorder the terms:
-3.5 + 3.5 + -1.9a + a2 = 0 + 3.5

Combine like terms: -3.5 + 3.5 = 0.0
0.0 + -1.9a + a2 = 0 + 3.5
-1.9a + a2 = 0 + 3.5

Combine like terms: 0 + 3.5 = 3.5
-1.9a + a2 = 3.5

The a term is -1.9a.  Take half its coefficient (-0.95).
Square it (0.9025) and add it to both sides.

Add '0.9025' to each side of the equation.
-1.9a + 0.9025 + a2 = 3.5 + 0.9025

Reorder the terms:
0.9025 + -1.9a + a2 = 3.5 + 0.9025

Combine like terms: 3.5 + 0.9025 = 4.4025
0.9025 + -1.9a + a2 = 4.4025

Factor a perfect square on the left side:
(a + -0.95)(a + -0.95) = 4.4025

Calculate the square root of the right side: 2.098213526

Break this problem into two subproblems by setting 
(a + -0.95) equal to 2.098213526 and -2.098213526.

Subproblem 1

a + -0.95 = 2.098213526 Simplifying a + -0.95 = 2.098213526 Reorder the terms: -0.95 + a = 2.098213526 Solving -0.95 + a = 2.098213526 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '0.95' to each side of the equation. -0.95 + 0.95 + a = 2.098213526 + 0.95 Combine like terms: -0.95 + 0.95 = 0.00 0.00 + a = 2.098213526 + 0.95 a = 2.098213526 + 0.95 Combine like terms: 2.098213526 + 0.95 = 3.048213526 a = 3.048213526 Simplifying a = 3.048213526

Subproblem 2

a + -0.95 = -2.098213526 Simplifying a + -0.95 = -2.098213526 Reorder the terms: -0.95 + a = -2.098213526 Solving -0.95 + a = -2.098213526 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '0.95' to each side of the equation. -0.95 + 0.95 + a = -2.098213526 + 0.95 Combine like terms: -0.95 + 0.95 = 0.00 0.00 + a = -2.098213526 + 0.95 a = -2.098213526 + 0.95 Combine like terms: -2.098213526 + 0.95 = -1.148213526 a = -1.148213526 Simplifying a = -1.148213526

Solution

The solution to the problem is based on the solutions from the subproblems. a = {3.048213526, -1.148213526}

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