-5x^2-37x+18=0

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Solution for -5x^2-37x+18=0 equation:


Simplifying
-5x2 + -37x + 18 = 0

Reorder the terms:
18 + -37x + -5x2 = 0

Solving
18 + -37x + -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'.
-3.6 + 7.4x + x2 = 0

Move the constant term to the right:

Add '3.6' to each side of the equation.
-3.6 + 7.4x + 3.6 + x2 = 0 + 3.6

Reorder the terms:
-3.6 + 3.6 + 7.4x + x2 = 0 + 3.6

Combine like terms: -3.6 + 3.6 = 0.0
0.0 + 7.4x + x2 = 0 + 3.6
7.4x + x2 = 0 + 3.6

Combine like terms: 0 + 3.6 = 3.6
7.4x + x2 = 3.6

The x term is 7.4x.  Take half its coefficient (3.7).
Square it (13.69) and add it to both sides.

Add '13.69' to each side of the equation.
7.4x + 13.69 + x2 = 3.6 + 13.69

Reorder the terms:
13.69 + 7.4x + x2 = 3.6 + 13.69

Combine like terms: 3.6 + 13.69 = 17.29
13.69 + 7.4x + x2 = 17.29

Factor a perfect square on the left side:
(x + 3.7)(x + 3.7) = 17.29

Calculate the square root of the right side: 4.158124577

Break this problem into two subproblems by setting 
(x + 3.7) equal to 4.158124577 and -4.158124577.

Subproblem 1

x + 3.7 = 4.158124577 Simplifying x + 3.7 = 4.158124577 Reorder the terms: 3.7 + x = 4.158124577 Solving 3.7 + x = 4.158124577 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.7' to each side of the equation. 3.7 + -3.7 + x = 4.158124577 + -3.7 Combine like terms: 3.7 + -3.7 = 0.0 0.0 + x = 4.158124577 + -3.7 x = 4.158124577 + -3.7 Combine like terms: 4.158124577 + -3.7 = 0.458124577 x = 0.458124577 Simplifying x = 0.458124577

Subproblem 2

x + 3.7 = -4.158124577 Simplifying x + 3.7 = -4.158124577 Reorder the terms: 3.7 + x = -4.158124577 Solving 3.7 + x = -4.158124577 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.7' to each side of the equation. 3.7 + -3.7 + x = -4.158124577 + -3.7 Combine like terms: 3.7 + -3.7 = 0.0 0.0 + x = -4.158124577 + -3.7 x = -4.158124577 + -3.7 Combine like terms: -4.158124577 + -3.7 = -7.858124577 x = -7.858124577 Simplifying x = -7.858124577

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.458124577, -7.858124577}

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