A^2-5A+9=6

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Solution for A^2-5A+9=6 equation:


Simplifying
A2 + -5A + 9 = 6

Reorder the terms:
9 + -5A + A2 = 6

Solving
9 + -5A + A2 = 6

Solving for variable 'A'.

Reorder the terms:
9 + -6 + -5A + A2 = 6 + -6

Combine like terms: 9 + -6 = 3
3 + -5A + A2 = 6 + -6

Combine like terms: 6 + -6 = 0
3 + -5A + A2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-3' to each side of the equation.
3 + -5A + -3 + A2 = 0 + -3

Reorder the terms:
3 + -3 + -5A + A2 = 0 + -3

Combine like terms: 3 + -3 = 0
0 + -5A + A2 = 0 + -3
-5A + A2 = 0 + -3

Combine like terms: 0 + -3 = -3
-5A + A2 = -3

The A term is -5A.  Take half its coefficient (-2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
-5A + 6.25 + A2 = -3 + 6.25

Reorder the terms:
6.25 + -5A + A2 = -3 + 6.25

Combine like terms: -3 + 6.25 = 3.25
6.25 + -5A + A2 = 3.25

Factor a perfect square on the left side:
(A + -2.5)(A + -2.5) = 3.25

Calculate the square root of the right side: 1.802775638

Break this problem into two subproblems by setting 
(A + -2.5) equal to 1.802775638 and -1.802775638.

Subproblem 1

A + -2.5 = 1.802775638 Simplifying A + -2.5 = 1.802775638 Reorder the terms: -2.5 + A = 1.802775638 Solving -2.5 + A = 1.802775638 Solving for variable 'A'. Move all terms containing A to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + A = 1.802775638 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + A = 1.802775638 + 2.5 A = 1.802775638 + 2.5 Combine like terms: 1.802775638 + 2.5 = 4.302775638 A = 4.302775638 Simplifying A = 4.302775638

Subproblem 2

A + -2.5 = -1.802775638 Simplifying A + -2.5 = -1.802775638 Reorder the terms: -2.5 + A = -1.802775638 Solving -2.5 + A = -1.802775638 Solving for variable 'A'. Move all terms containing A to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + A = -1.802775638 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + A = -1.802775638 + 2.5 A = -1.802775638 + 2.5 Combine like terms: -1.802775638 + 2.5 = 0.697224362 A = 0.697224362 Simplifying A = 0.697224362

Solution

The solution to the problem is based on the solutions from the subproblems. A = {4.302775638, 0.697224362}

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