2x^2+19x=180

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Solution for 2x^2+19x=180 equation:


Simplifying
2x2 + 19x = 180

Reorder the terms:
19x + 2x2 = 180

Solving
19x + 2x2 = 180

Solving for variable 'x'.

Reorder the terms:
-180 + 19x + 2x2 = 180 + -180

Combine like terms: 180 + -180 = 0
-180 + 19x + 2x2 = 0

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

Divide each side by '2'.
-90 + 9.5x + x2 = 0

Move the constant term to the right:

Add '90' to each side of the equation.
-90 + 9.5x + 90 + x2 = 0 + 90

Reorder the terms:
-90 + 90 + 9.5x + x2 = 0 + 90

Combine like terms: -90 + 90 = 0
0 + 9.5x + x2 = 0 + 90
9.5x + x2 = 0 + 90

Combine like terms: 0 + 90 = 90
9.5x + x2 = 90

The x term is 9.5x.  Take half its coefficient (4.75).
Square it (22.5625) and add it to both sides.

Add '22.5625' to each side of the equation.
9.5x + 22.5625 + x2 = 90 + 22.5625

Reorder the terms:
22.5625 + 9.5x + x2 = 90 + 22.5625

Combine like terms: 90 + 22.5625 = 112.5625
22.5625 + 9.5x + x2 = 112.5625

Factor a perfect square on the left side:
(x + 4.75)(x + 4.75) = 112.5625

Calculate the square root of the right side: 10.609547587

Break this problem into two subproblems by setting 
(x + 4.75) equal to 10.609547587 and -10.609547587.

Subproblem 1

x + 4.75 = 10.609547587 Simplifying x + 4.75 = 10.609547587 Reorder the terms: 4.75 + x = 10.609547587 Solving 4.75 + x = 10.609547587 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.75' to each side of the equation. 4.75 + -4.75 + x = 10.609547587 + -4.75 Combine like terms: 4.75 + -4.75 = 0.00 0.00 + x = 10.609547587 + -4.75 x = 10.609547587 + -4.75 Combine like terms: 10.609547587 + -4.75 = 5.859547587 x = 5.859547587 Simplifying x = 5.859547587

Subproblem 2

x + 4.75 = -10.609547587 Simplifying x + 4.75 = -10.609547587 Reorder the terms: 4.75 + x = -10.609547587 Solving 4.75 + x = -10.609547587 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.75' to each side of the equation. 4.75 + -4.75 + x = -10.609547587 + -4.75 Combine like terms: 4.75 + -4.75 = 0.00 0.00 + x = -10.609547587 + -4.75 x = -10.609547587 + -4.75 Combine like terms: -10.609547587 + -4.75 = -15.359547587 x = -15.359547587 Simplifying x = -15.359547587

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.859547587, -15.359547587}

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