5x^2-22x+20=0

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Solution for 5x^2-22x+20=0 equation:


Simplifying
5x2 + -22x + 20 = 0

Reorder the terms:
20 + -22x + 5x2 = 0

Solving
20 + -22x + 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'.
4 + -4.4x + x2 = 0

Move the constant term to the right:

Add '-4' to each side of the equation.
4 + -4.4x + -4 + x2 = 0 + -4

Reorder the terms:
4 + -4 + -4.4x + x2 = 0 + -4

Combine like terms: 4 + -4 = 0
0 + -4.4x + x2 = 0 + -4
-4.4x + x2 = 0 + -4

Combine like terms: 0 + -4 = -4
-4.4x + x2 = -4

The x term is -4.4x.  Take half its coefficient (-2.2).
Square it (4.84) and add it to both sides.

Add '4.84' to each side of the equation.
-4.4x + 4.84 + x2 = -4 + 4.84

Reorder the terms:
4.84 + -4.4x + x2 = -4 + 4.84

Combine like terms: -4 + 4.84 = 0.84
4.84 + -4.4x + x2 = 0.84

Factor a perfect square on the left side:
(x + -2.2)(x + -2.2) = 0.84

Calculate the square root of the right side: 0.916515139

Break this problem into two subproblems by setting 
(x + -2.2) equal to 0.916515139 and -0.916515139.

Subproblem 1

x + -2.2 = 0.916515139 Simplifying x + -2.2 = 0.916515139 Reorder the terms: -2.2 + x = 0.916515139 Solving -2.2 + x = 0.916515139 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.2' to each side of the equation. -2.2 + 2.2 + x = 0.916515139 + 2.2 Combine like terms: -2.2 + 2.2 = 0.0 0.0 + x = 0.916515139 + 2.2 x = 0.916515139 + 2.2 Combine like terms: 0.916515139 + 2.2 = 3.116515139 x = 3.116515139 Simplifying x = 3.116515139

Subproblem 2

x + -2.2 = -0.916515139 Simplifying x + -2.2 = -0.916515139 Reorder the terms: -2.2 + x = -0.916515139 Solving -2.2 + x = -0.916515139 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.2' to each side of the equation. -2.2 + 2.2 + x = -0.916515139 + 2.2 Combine like terms: -2.2 + 2.2 = 0.0 0.0 + x = -0.916515139 + 2.2 x = -0.916515139 + 2.2 Combine like terms: -0.916515139 + 2.2 = 1.283484861 x = 1.283484861 Simplifying x = 1.283484861

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.116515139, 1.283484861}

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