5x^2+11x-500=0

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Solution for 5x^2+11x-500=0 equation:


Simplifying
5x2 + 11x + -500 = 0

Reorder the terms:
-500 + 11x + 5x2 = 0

Solving
-500 + 11x + 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'.
-100 + 2.2x + x2 = 0

Move the constant term to the right:

Add '100' to each side of the equation.
-100 + 2.2x + 100 + x2 = 0 + 100

Reorder the terms:
-100 + 100 + 2.2x + x2 = 0 + 100

Combine like terms: -100 + 100 = 0
0 + 2.2x + x2 = 0 + 100
2.2x + x2 = 0 + 100

Combine like terms: 0 + 100 = 100
2.2x + x2 = 100

The x term is 2.2x.  Take half its coefficient (1.1).
Square it (1.21) and add it to both sides.

Add '1.21' to each side of the equation.
2.2x + 1.21 + x2 = 100 + 1.21

Reorder the terms:
1.21 + 2.2x + x2 = 100 + 1.21

Combine like terms: 100 + 1.21 = 101.21
1.21 + 2.2x + x2 = 101.21

Factor a perfect square on the left side:
(x + 1.1)(x + 1.1) = 101.21

Calculate the square root of the right side: 10.060318086

Break this problem into two subproblems by setting 
(x + 1.1) equal to 10.060318086 and -10.060318086.

Subproblem 1

x + 1.1 = 10.060318086 Simplifying x + 1.1 = 10.060318086 Reorder the terms: 1.1 + x = 10.060318086 Solving 1.1 + x = 10.060318086 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.1' to each side of the equation. 1.1 + -1.1 + x = 10.060318086 + -1.1 Combine like terms: 1.1 + -1.1 = 0.0 0.0 + x = 10.060318086 + -1.1 x = 10.060318086 + -1.1 Combine like terms: 10.060318086 + -1.1 = 8.960318086 x = 8.960318086 Simplifying x = 8.960318086

Subproblem 2

x + 1.1 = -10.060318086 Simplifying x + 1.1 = -10.060318086 Reorder the terms: 1.1 + x = -10.060318086 Solving 1.1 + x = -10.060318086 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.1' to each side of the equation. 1.1 + -1.1 + x = -10.060318086 + -1.1 Combine like terms: 1.1 + -1.1 = 0.0 0.0 + x = -10.060318086 + -1.1 x = -10.060318086 + -1.1 Combine like terms: -10.060318086 + -1.1 = -11.160318086 x = -11.160318086 Simplifying x = -11.160318086

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.960318086, -11.160318086}

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