5x^2-x-224=0

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Solution for 5x^2-x-224=0 equation:


Simplifying
5x2 + -1x + -224 = 0

Reorder the terms:
-224 + -1x + 5x2 = 0

Solving
-224 + -1x + 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'.
-44.8 + -0.2x + x2 = 0

Move the constant term to the right:

Add '44.8' to each side of the equation.
-44.8 + -0.2x + 44.8 + x2 = 0 + 44.8

Reorder the terms:
-44.8 + 44.8 + -0.2x + x2 = 0 + 44.8

Combine like terms: -44.8 + 44.8 = 0.0
0.0 + -0.2x + x2 = 0 + 44.8
-0.2x + x2 = 0 + 44.8

Combine like terms: 0 + 44.8 = 44.8
-0.2x + x2 = 44.8

The x term is -0.2x.  Take half its coefficient (-0.1).
Square it (0.01) and add it to both sides.

Add '0.01' to each side of the equation.
-0.2x + 0.01 + x2 = 44.8 + 0.01

Reorder the terms:
0.01 + -0.2x + x2 = 44.8 + 0.01

Combine like terms: 44.8 + 0.01 = 44.81
0.01 + -0.2x + x2 = 44.81

Factor a perfect square on the left side:
(x + -0.1)(x + -0.1) = 44.81

Calculate the square root of the right side: 6.694027188

Break this problem into two subproblems by setting 
(x + -0.1) equal to 6.694027188 and -6.694027188.

Subproblem 1

x + -0.1 = 6.694027188 Simplifying x + -0.1 = 6.694027188 Reorder the terms: -0.1 + x = 6.694027188 Solving -0.1 + x = 6.694027188 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.1' to each side of the equation. -0.1 + 0.1 + x = 6.694027188 + 0.1 Combine like terms: -0.1 + 0.1 = 0.0 0.0 + x = 6.694027188 + 0.1 x = 6.694027188 + 0.1 Combine like terms: 6.694027188 + 0.1 = 6.794027188 x = 6.794027188 Simplifying x = 6.794027188

Subproblem 2

x + -0.1 = -6.694027188 Simplifying x + -0.1 = -6.694027188 Reorder the terms: -0.1 + x = -6.694027188 Solving -0.1 + x = -6.694027188 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.1' to each side of the equation. -0.1 + 0.1 + x = -6.694027188 + 0.1 Combine like terms: -0.1 + 0.1 = 0.0 0.0 + x = -6.694027188 + 0.1 x = -6.694027188 + 0.1 Combine like terms: -6.694027188 + 0.1 = -6.594027188 x = -6.594027188 Simplifying x = -6.594027188

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.794027188, -6.594027188}

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