5x^2=5x+17

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Solution for 5x^2=5x+17 equation:


Simplifying
5x2 = 5x + 17

Reorder the terms:
5x2 = 17 + 5x

Solving
5x2 = 17 + 5x

Solving for variable 'x'.

Reorder the terms:
-17 + -5x + 5x2 = 17 + 5x + -17 + -5x

Reorder the terms:
-17 + -5x + 5x2 = 17 + -17 + 5x + -5x

Combine like terms: 17 + -17 = 0
-17 + -5x + 5x2 = 0 + 5x + -5x
-17 + -5x + 5x2 = 5x + -5x

Combine like terms: 5x + -5x = 0
-17 + -5x + 5x2 = 0

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

Divide each side by '5'.
-3.4 + -1x + x2 = 0

Move the constant term to the right:

Add '3.4' to each side of the equation.
-3.4 + -1x + 3.4 + x2 = 0 + 3.4

Reorder the terms:
-3.4 + 3.4 + -1x + x2 = 0 + 3.4

Combine like terms: -3.4 + 3.4 = 0.0
0.0 + -1x + x2 = 0 + 3.4
-1x + x2 = 0 + 3.4

Combine like terms: 0 + 3.4 = 3.4
-1x + x2 = 3.4

The x term is -1x.  Take half its coefficient (-0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
-1x + 0.25 + x2 = 3.4 + 0.25

Reorder the terms:
0.25 + -1x + x2 = 3.4 + 0.25

Combine like terms: 3.4 + 0.25 = 3.65
0.25 + -1x + x2 = 3.65

Factor a perfect square on the left side:
(x + -0.5)(x + -0.5) = 3.65

Calculate the square root of the right side: 1.910497317

Break this problem into two subproblems by setting 
(x + -0.5) equal to 1.910497317 and -1.910497317.

Subproblem 1

x + -0.5 = 1.910497317 Simplifying x + -0.5 = 1.910497317 Reorder the terms: -0.5 + x = 1.910497317 Solving -0.5 + x = 1.910497317 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x = 1.910497317 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = 1.910497317 + 0.5 x = 1.910497317 + 0.5 Combine like terms: 1.910497317 + 0.5 = 2.410497317 x = 2.410497317 Simplifying x = 2.410497317

Subproblem 2

x + -0.5 = -1.910497317 Simplifying x + -0.5 = -1.910497317 Reorder the terms: -0.5 + x = -1.910497317 Solving -0.5 + x = -1.910497317 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x = -1.910497317 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = -1.910497317 + 0.5 x = -1.910497317 + 0.5 Combine like terms: -1.910497317 + 0.5 = -1.410497317 x = -1.410497317 Simplifying x = -1.410497317

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.410497317, -1.410497317}

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