19x^2+19x-450=0

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Solution for 19x^2+19x-450=0 equation:


Simplifying
19x2 + 19x + -450 = 0

Reorder the terms:
-450 + 19x + 19x2 = 0

Solving
-450 + 19x + 19x2 = 0

Solving for variable 'x'.

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

Divide each side by '19'.
-23.68421053 + x + x2 = 0

Move the constant term to the right:

Add '23.68421053' to each side of the equation.
-23.68421053 + x + 23.68421053 + x2 = 0 + 23.68421053

Reorder the terms:
-23.68421053 + 23.68421053 + x + x2 = 0 + 23.68421053

Combine like terms: -23.68421053 + 23.68421053 = 0.00000000
0.00000000 + x + x2 = 0 + 23.68421053
x + x2 = 0 + 23.68421053

Combine like terms: 0 + 23.68421053 = 23.68421053
x + x2 = 23.68421053

The x term is x.  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.
 + 0.25 + x2 = 23.68421053 + 0.25

Combine like terms:  + 0.25 = 1.25
1.25 + x2 = 23.68421053 + 0.25

Combine like terms: 23.68421053 + 0.25 = 23.93421053
1.25 + x2 = 23.93421053

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 23.93421053

Calculate the square root of the right side: 4.892260268

Break this problem into two subproblems by setting 
(x + 0.5) equal to 4.892260268 and -4.892260268.

Subproblem 1

x + 0.5 = 4.892260268 Simplifying x + 0.5 = 4.892260268 Reorder the terms: 0.5 + x = 4.892260268 Solving 0.5 + x = 4.892260268 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 = 4.892260268 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 4.892260268 + -0.5 x = 4.892260268 + -0.5 Combine like terms: 4.892260268 + -0.5 = 4.392260268 x = 4.392260268 Simplifying x = 4.392260268

Subproblem 2

x + 0.5 = -4.892260268 Simplifying x + 0.5 = -4.892260268 Reorder the terms: 0.5 + x = -4.892260268 Solving 0.5 + x = -4.892260268 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 = -4.892260268 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -4.892260268 + -0.5 x = -4.892260268 + -0.5 Combine like terms: -4.892260268 + -0.5 = -5.392260268 x = -5.392260268 Simplifying x = -5.392260268

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.392260268, -5.392260268}

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