a^2-8a+3=0

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Solution for a^2-8a+3=0 equation:


Simplifying
a2 + -8a + 3 = 0

Reorder the terms:
3 + -8a + a2 = 0

Solving
3 + -8a + a2 = 0

Solving for variable 'a'.

Begin completing the square.

Move the constant term to the right:

Add '-3' to each side of the equation.
3 + -8a + -3 + a2 = 0 + -3

Reorder the terms:
3 + -3 + -8a + a2 = 0 + -3

Combine like terms: 3 + -3 = 0
0 + -8a + a2 = 0 + -3
-8a + a2 = 0 + -3

Combine like terms: 0 + -3 = -3
-8a + a2 = -3

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 = -3 + 16

Reorder the terms:
16 + -8a + a2 = -3 + 16

Combine like terms: -3 + 16 = 13
16 + -8a + a2 = 13

Factor a perfect square on the left side:
(a + -4)(a + -4) = 13

Calculate the square root of the right side: 3.605551275

Break this problem into two subproblems by setting 
(a + -4) equal to 3.605551275 and -3.605551275.

Subproblem 1

a + -4 = 3.605551275 Simplifying a + -4 = 3.605551275 Reorder the terms: -4 + a = 3.605551275 Solving -4 + a = 3.605551275 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 = 3.605551275 + 4 Combine like terms: -4 + 4 = 0 0 + a = 3.605551275 + 4 a = 3.605551275 + 4 Combine like terms: 3.605551275 + 4 = 7.605551275 a = 7.605551275 Simplifying a = 7.605551275

Subproblem 2

a + -4 = -3.605551275 Simplifying a + -4 = -3.605551275 Reorder the terms: -4 + a = -3.605551275 Solving -4 + a = -3.605551275 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 = -3.605551275 + 4 Combine like terms: -4 + 4 = 0 0 + a = -3.605551275 + 4 a = -3.605551275 + 4 Combine like terms: -3.605551275 + 4 = 0.394448725 a = 0.394448725 Simplifying a = 0.394448725

Solution

The solution to the problem is based on the solutions from the subproblems. a = {7.605551275, 0.394448725}

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