34=0.0021a^2-.286a+16.28

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Solution for 34=0.0021a^2-.286a+16.28 equation:


Simplifying
34 = 0.0021a2 + -0.286a + 16.28

Reorder the terms:
34 = 16.28 + -0.286a + 0.0021a2

Solving
34 = 16.28 + -0.286a + 0.0021a2

Solving for variable 'a'.

Combine like terms: 34 + -16.28 = 17.72
17.72 + 0.286a + -0.0021a2 = 16.28 + -0.286a + 0.0021a2 + -16.28 + 0.286a + -0.0021a2

Reorder the terms:
17.72 + 0.286a + -0.0021a2 = 16.28 + -16.28 + -0.286a + 0.286a + 0.0021a2 + -0.0021a2

Combine like terms: 16.28 + -16.28 = 0.00
17.72 + 0.286a + -0.0021a2 = 0.00 + -0.286a + 0.286a + 0.0021a2 + -0.0021a2
17.72 + 0.286a + -0.0021a2 = -0.286a + 0.286a + 0.0021a2 + -0.0021a2

Combine like terms: -0.286a + 0.286a = 0.000
17.72 + 0.286a + -0.0021a2 = 0.000 + 0.0021a2 + -0.0021a2
17.72 + 0.286a + -0.0021a2 = 0.0021a2 + -0.0021a2

Combine like terms: 0.0021a2 + -0.0021a2 = 0.0000
17.72 + 0.286a + -0.0021a2 = 0.0000

Begin completing the square.  Divide all terms by
-0.0021 the coefficient of the squared term: 

Divide each side by '-0.0021'.
-8438.095238 + -136.1904762a + a2 = 0

Move the constant term to the right:

Add '8438.095238' to each side of the equation.
-8438.095238 + -136.1904762a + 8438.095238 + a2 = 0 + 8438.095238

Reorder the terms:
-8438.095238 + 8438.095238 + -136.1904762a + a2 = 0 + 8438.095238

Combine like terms: -8438.095238 + 8438.095238 = 0.000000
0.000000 + -136.1904762a + a2 = 0 + 8438.095238
-136.1904762a + a2 = 0 + 8438.095238

Combine like terms: 0 + 8438.095238 = 8438.095238
-136.1904762a + a2 = 8438.095238

The a term is -136.1904762a.  Take half its coefficient (-68.0952381).
Square it (4636.961452) and add it to both sides.

Add '4636.961452' to each side of the equation.
-136.1904762a + 4636.961452 + a2 = 8438.095238 + 4636.961452

Reorder the terms:
4636.961452 + -136.1904762a + a2 = 8438.095238 + 4636.961452

Combine like terms: 8438.095238 + 4636.961452 = 13075.05669
4636.961452 + -136.1904762a + a2 = 13075.05669

Factor a perfect square on the left side:
(a + -68.0952381)(a + -68.0952381) = 13075.05669

Calculate the square root of the right side: 114.346214148

Break this problem into two subproblems by setting 
(a + -68.0952381) equal to 114.346214148 and -114.346214148.

Subproblem 1

a + -68.0952381 = 114.346214148 Simplifying a + -68.0952381 = 114.346214148 Reorder the terms: -68.0952381 + a = 114.346214148 Solving -68.0952381 + a = 114.346214148 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '68.0952381' to each side of the equation. -68.0952381 + 68.0952381 + a = 114.346214148 + 68.0952381 Combine like terms: -68.0952381 + 68.0952381 = 0.0000000 0.0000000 + a = 114.346214148 + 68.0952381 a = 114.346214148 + 68.0952381 Combine like terms: 114.346214148 + 68.0952381 = 182.441452248 a = 182.441452248 Simplifying a = 182.441452248

Subproblem 2

a + -68.0952381 = -114.346214148 Simplifying a + -68.0952381 = -114.346214148 Reorder the terms: -68.0952381 + a = -114.346214148 Solving -68.0952381 + a = -114.346214148 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '68.0952381' to each side of the equation. -68.0952381 + 68.0952381 + a = -114.346214148 + 68.0952381 Combine like terms: -68.0952381 + 68.0952381 = 0.0000000 0.0000000 + a = -114.346214148 + 68.0952381 a = -114.346214148 + 68.0952381 Combine like terms: -114.346214148 + 68.0952381 = -46.250976048 a = -46.250976048 Simplifying a = -46.250976048

Solution

The solution to the problem is based on the solutions from the subproblems. a = {182.441452248, -46.250976048}

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