5x^2-32x+15=0

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Solution for 5x^2-32x+15=0 equation:


Simplifying
5x2 + -32x + 15 = 0

Reorder the terms:
15 + -32x + 5x2 = 0

Solving
15 + -32x + 5x2 = 0

Solving for variable 'x'.

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

Divide each side by '5'.
3 + -6.4x + x2 = 0

Move the constant term to the right:

Add '-3' to each side of the equation.
3 + -6.4x + -3 + x2 = 0 + -3

Reorder the terms:
3 + -3 + -6.4x + x2 = 0 + -3

Combine like terms: 3 + -3 = 0
0 + -6.4x + x2 = 0 + -3
-6.4x + x2 = 0 + -3

Combine like terms: 0 + -3 = -3
-6.4x + x2 = -3

The x term is -6.4x.  Take half its coefficient (-3.2).
Square it (10.24) and add it to both sides.

Add '10.24' to each side of the equation.
-6.4x + 10.24 + x2 = -3 + 10.24

Reorder the terms:
10.24 + -6.4x + x2 = -3 + 10.24

Combine like terms: -3 + 10.24 = 7.24
10.24 + -6.4x + x2 = 7.24

Factor a perfect square on the left side:
(x + -3.2)(x + -3.2) = 7.24

Calculate the square root of the right side: 2.690724809

Break this problem into two subproblems by setting 
(x + -3.2) equal to 2.690724809 and -2.690724809.

Subproblem 1

x + -3.2 = 2.690724809 Simplifying x + -3.2 = 2.690724809 Reorder the terms: -3.2 + x = 2.690724809 Solving -3.2 + x = 2.690724809 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.2' to each side of the equation. -3.2 + 3.2 + x = 2.690724809 + 3.2 Combine like terms: -3.2 + 3.2 = 0.0 0.0 + x = 2.690724809 + 3.2 x = 2.690724809 + 3.2 Combine like terms: 2.690724809 + 3.2 = 5.890724809 x = 5.890724809 Simplifying x = 5.890724809

Subproblem 2

x + -3.2 = -2.690724809 Simplifying x + -3.2 = -2.690724809 Reorder the terms: -3.2 + x = -2.690724809 Solving -3.2 + x = -2.690724809 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.2' to each side of the equation. -3.2 + 3.2 + x = -2.690724809 + 3.2 Combine like terms: -3.2 + 3.2 = 0.0 0.0 + x = -2.690724809 + 3.2 x = -2.690724809 + 3.2 Combine like terms: -2.690724809 + 3.2 = 0.509275191 x = 0.509275191 Simplifying x = 0.509275191

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.890724809, 0.509275191}

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