5x^2-22x+4=0

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Solution for 5x^2-22x+4=0 equation:


Simplifying
5x2 + -22x + 4 = 0

Reorder the terms:
4 + -22x + 5x2 = 0

Solving
4 + -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'.
0.8 + -4.4x + x2 = 0

Move the constant term to the right:

Add '-0.8' to each side of the equation.
0.8 + -4.4x + -0.8 + x2 = 0 + -0.8

Reorder the terms:
0.8 + -0.8 + -4.4x + x2 = 0 + -0.8

Combine like terms: 0.8 + -0.8 = 0.0
0.0 + -4.4x + x2 = 0 + -0.8
-4.4x + x2 = 0 + -0.8

Combine like terms: 0 + -0.8 = -0.8
-4.4x + x2 = -0.8

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 = -0.8 + 4.84

Reorder the terms:
4.84 + -4.4x + x2 = -0.8 + 4.84

Combine like terms: -0.8 + 4.84 = 4.04
4.84 + -4.4x + x2 = 4.04

Factor a perfect square on the left side:
(x + -2.2)(x + -2.2) = 4.04

Calculate the square root of the right side: 2.009975124

Break this problem into two subproblems by setting 
(x + -2.2) equal to 2.009975124 and -2.009975124.

Subproblem 1

x + -2.2 = 2.009975124 Simplifying x + -2.2 = 2.009975124 Reorder the terms: -2.2 + x = 2.009975124 Solving -2.2 + x = 2.009975124 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 = 2.009975124 + 2.2 Combine like terms: -2.2 + 2.2 = 0.0 0.0 + x = 2.009975124 + 2.2 x = 2.009975124 + 2.2 Combine like terms: 2.009975124 + 2.2 = 4.209975124 x = 4.209975124 Simplifying x = 4.209975124

Subproblem 2

x + -2.2 = -2.009975124 Simplifying x + -2.2 = -2.009975124 Reorder the terms: -2.2 + x = -2.009975124 Solving -2.2 + x = -2.009975124 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 = -2.009975124 + 2.2 Combine like terms: -2.2 + 2.2 = 0.0 0.0 + x = -2.009975124 + 2.2 x = -2.009975124 + 2.2 Combine like terms: -2.009975124 + 2.2 = 0.190024876 x = 0.190024876 Simplifying x = 0.190024876

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.209975124, 0.190024876}

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