5a^2-10a+2=0

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Solution for 5a^2-10a+2=0 equation:


Simplifying
5a2 + -10a + 2 = 0

Reorder the terms:
2 + -10a + 5a2 = 0

Solving
2 + -10a + 5a2 = 0

Solving for variable 'a'.

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

Divide each side by '5'.
0.4 + -2a + a2 = 0

Move the constant term to the right:

Add '-0.4' to each side of the equation.
0.4 + -2a + -0.4 + a2 = 0 + -0.4

Reorder the terms:
0.4 + -0.4 + -2a + a2 = 0 + -0.4

Combine like terms: 0.4 + -0.4 = 0.0
0.0 + -2a + a2 = 0 + -0.4
-2a + a2 = 0 + -0.4

Combine like terms: 0 + -0.4 = -0.4
-2a + a2 = -0.4

The a term is -2a.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2a + 1 + a2 = -0.4 + 1

Reorder the terms:
1 + -2a + a2 = -0.4 + 1

Combine like terms: -0.4 + 1 = 0.6
1 + -2a + a2 = 0.6

Factor a perfect square on the left side:
(a + -1)(a + -1) = 0.6

Calculate the square root of the right side: 0.774596669

Break this problem into two subproblems by setting 
(a + -1) equal to 0.774596669 and -0.774596669.

Subproblem 1

a + -1 = 0.774596669 Simplifying a + -1 = 0.774596669 Reorder the terms: -1 + a = 0.774596669 Solving -1 + a = 0.774596669 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + a = 0.774596669 + 1 Combine like terms: -1 + 1 = 0 0 + a = 0.774596669 + 1 a = 0.774596669 + 1 Combine like terms: 0.774596669 + 1 = 1.774596669 a = 1.774596669 Simplifying a = 1.774596669

Subproblem 2

a + -1 = -0.774596669 Simplifying a + -1 = -0.774596669 Reorder the terms: -1 + a = -0.774596669 Solving -1 + a = -0.774596669 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + a = -0.774596669 + 1 Combine like terms: -1 + 1 = 0 0 + a = -0.774596669 + 1 a = -0.774596669 + 1 Combine like terms: -0.774596669 + 1 = 0.225403331 a = 0.225403331 Simplifying a = 0.225403331

Solution

The solution to the problem is based on the solutions from the subproblems. a = {1.774596669, 0.225403331}

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