(a^2-8a+9)=0

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Solution for (a^2-8a+9)=0 equation:


Simplifying
(a2 + -8a + 9) = 0

Reorder the terms:
(9 + -8a + a2) = 0

Remove parenthesis around (9 + -8a + a2)
9 + -8a + a2 = 0

Solving
9 + -8a + a2 = 0

Solving for variable 'a'.

Begin completing the square.

Move the constant term to the right:

Add '-9' to each side of the equation.
9 + -8a + -9 + a2 = 0 + -9

Reorder the terms:
9 + -9 + -8a + a2 = 0 + -9

Combine like terms: 9 + -9 = 0
0 + -8a + a2 = 0 + -9
-8a + a2 = 0 + -9

Combine like terms: 0 + -9 = -9
-8a + a2 = -9

The a term is -8a.  Take half its coefficient (-4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
-8a + 16 + a2 = -9 + 16

Reorder the terms:
16 + -8a + a2 = -9 + 16

Combine like terms: -9 + 16 = 7
16 + -8a + a2 = 7

Factor a perfect square on the left side:
(a + -4)(a + -4) = 7

Calculate the square root of the right side: 2.645751311

Break this problem into two subproblems by setting 
(a + -4) equal to 2.645751311 and -2.645751311.

Subproblem 1

a + -4 = 2.645751311 Simplifying a + -4 = 2.645751311 Reorder the terms: -4 + a = 2.645751311 Solving -4 + a = 2.645751311 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + a = 2.645751311 + 4 Combine like terms: -4 + 4 = 0 0 + a = 2.645751311 + 4 a = 2.645751311 + 4 Combine like terms: 2.645751311 + 4 = 6.645751311 a = 6.645751311 Simplifying a = 6.645751311

Subproblem 2

a + -4 = -2.645751311 Simplifying a + -4 = -2.645751311 Reorder the terms: -4 + a = -2.645751311 Solving -4 + a = -2.645751311 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + a = -2.645751311 + 4 Combine like terms: -4 + 4 = 0 0 + a = -2.645751311 + 4 a = -2.645751311 + 4 Combine like terms: -2.645751311 + 4 = 1.354248689 a = 1.354248689 Simplifying a = 1.354248689

Solution

The solution to the problem is based on the solutions from the subproblems. a = {6.645751311, 1.354248689}

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