5x^2-56x+36=0

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Solution for 5x^2-56x+36=0 equation:


Simplifying
5x2 + -56x + 36 = 0

Reorder the terms:
36 + -56x + 5x2 = 0

Solving
36 + -56x + 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'.
7.2 + -11.2x + x2 = 0

Move the constant term to the right:

Add '-7.2' to each side of the equation.
7.2 + -11.2x + -7.2 + x2 = 0 + -7.2

Reorder the terms:
7.2 + -7.2 + -11.2x + x2 = 0 + -7.2

Combine like terms: 7.2 + -7.2 = 0.0
0.0 + -11.2x + x2 = 0 + -7.2
-11.2x + x2 = 0 + -7.2

Combine like terms: 0 + -7.2 = -7.2
-11.2x + x2 = -7.2

The x term is -11.2x.  Take half its coefficient (-5.6).
Square it (31.36) and add it to both sides.

Add '31.36' to each side of the equation.
-11.2x + 31.36 + x2 = -7.2 + 31.36

Reorder the terms:
31.36 + -11.2x + x2 = -7.2 + 31.36

Combine like terms: -7.2 + 31.36 = 24.16
31.36 + -11.2x + x2 = 24.16

Factor a perfect square on the left side:
(x + -5.6)(x + -5.6) = 24.16

Calculate the square root of the right side: 4.915282291

Break this problem into two subproblems by setting 
(x + -5.6) equal to 4.915282291 and -4.915282291.

Subproblem 1

x + -5.6 = 4.915282291 Simplifying x + -5.6 = 4.915282291 Reorder the terms: -5.6 + x = 4.915282291 Solving -5.6 + x = 4.915282291 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5.6' to each side of the equation. -5.6 + 5.6 + x = 4.915282291 + 5.6 Combine like terms: -5.6 + 5.6 = 0.0 0.0 + x = 4.915282291 + 5.6 x = 4.915282291 + 5.6 Combine like terms: 4.915282291 + 5.6 = 10.515282291 x = 10.515282291 Simplifying x = 10.515282291

Subproblem 2

x + -5.6 = -4.915282291 Simplifying x + -5.6 = -4.915282291 Reorder the terms: -5.6 + x = -4.915282291 Solving -5.6 + x = -4.915282291 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5.6' to each side of the equation. -5.6 + 5.6 + x = -4.915282291 + 5.6 Combine like terms: -5.6 + 5.6 = 0.0 0.0 + x = -4.915282291 + 5.6 x = -4.915282291 + 5.6 Combine like terms: -4.915282291 + 5.6 = 0.684717709 x = 0.684717709 Simplifying x = 0.684717709

Solution

The solution to the problem is based on the solutions from the subproblems. x = {10.515282291, 0.684717709}

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