5x^2-28x+19=0

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Solution for 5x^2-28x+19=0 equation:


Simplifying
5x2 + -28x + 19 = 0

Reorder the terms:
19 + -28x + 5x2 = 0

Solving
19 + -28x + 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'.
3.8 + -5.6x + x2 = 0

Move the constant term to the right:

Add '-3.8' to each side of the equation.
3.8 + -5.6x + -3.8 + x2 = 0 + -3.8

Reorder the terms:
3.8 + -3.8 + -5.6x + x2 = 0 + -3.8

Combine like terms: 3.8 + -3.8 = 0.0
0.0 + -5.6x + x2 = 0 + -3.8
-5.6x + x2 = 0 + -3.8

Combine like terms: 0 + -3.8 = -3.8
-5.6x + x2 = -3.8

The x term is -5.6x.  Take half its coefficient (-2.8).
Square it (7.84) and add it to both sides.

Add '7.84' to each side of the equation.
-5.6x + 7.84 + x2 = -3.8 + 7.84

Reorder the terms:
7.84 + -5.6x + x2 = -3.8 + 7.84

Combine like terms: -3.8 + 7.84 = 4.04
7.84 + -5.6x + x2 = 4.04

Factor a perfect square on the left side:
(x + -2.8)(x + -2.8) = 4.04

Calculate the square root of the right side: 2.009975124

Break this problem into two subproblems by setting 
(x + -2.8) equal to 2.009975124 and -2.009975124.

Subproblem 1

x + -2.8 = 2.009975124 Simplifying x + -2.8 = 2.009975124 Reorder the terms: -2.8 + x = 2.009975124 Solving -2.8 + x = 2.009975124 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.8' to each side of the equation. -2.8 + 2.8 + x = 2.009975124 + 2.8 Combine like terms: -2.8 + 2.8 = 0.0 0.0 + x = 2.009975124 + 2.8 x = 2.009975124 + 2.8 Combine like terms: 2.009975124 + 2.8 = 4.809975124 x = 4.809975124 Simplifying x = 4.809975124

Subproblem 2

x + -2.8 = -2.009975124 Simplifying x + -2.8 = -2.009975124 Reorder the terms: -2.8 + x = -2.009975124 Solving -2.8 + x = -2.009975124 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.8' to each side of the equation. -2.8 + 2.8 + x = -2.009975124 + 2.8 Combine like terms: -2.8 + 2.8 = 0.0 0.0 + x = -2.009975124 + 2.8 x = -2.009975124 + 2.8 Combine like terms: -2.009975124 + 2.8 = 0.790024876 x = 0.790024876 Simplifying x = 0.790024876

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.809975124, 0.790024876}

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