x^2+38x-100=0

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Solution for x^2+38x-100=0 equation:


Simplifying
x2 + 38x + -100 = 0

Reorder the terms:
-100 + 38x + x2 = 0

Solving
-100 + 38x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '100' to each side of the equation.
-100 + 38x + 100 + x2 = 0 + 100

Reorder the terms:
-100 + 100 + 38x + x2 = 0 + 100

Combine like terms: -100 + 100 = 0
0 + 38x + x2 = 0 + 100
38x + x2 = 0 + 100

Combine like terms: 0 + 100 = 100
38x + x2 = 100

The x term is 38x.  Take half its coefficient (19).
Square it (361) and add it to both sides.

Add '361' to each side of the equation.
38x + 361 + x2 = 100 + 361

Reorder the terms:
361 + 38x + x2 = 100 + 361

Combine like terms: 100 + 361 = 461
361 + 38x + x2 = 461

Factor a perfect square on the left side:
(x + 19)(x + 19) = 461

Calculate the square root of the right side: 21.470910554

Break this problem into two subproblems by setting 
(x + 19) equal to 21.470910554 and -21.470910554.

Subproblem 1

x + 19 = 21.470910554 Simplifying x + 19 = 21.470910554 Reorder the terms: 19 + x = 21.470910554 Solving 19 + x = 21.470910554 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-19' to each side of the equation. 19 + -19 + x = 21.470910554 + -19 Combine like terms: 19 + -19 = 0 0 + x = 21.470910554 + -19 x = 21.470910554 + -19 Combine like terms: 21.470910554 + -19 = 2.470910554 x = 2.470910554 Simplifying x = 2.470910554

Subproblem 2

x + 19 = -21.470910554 Simplifying x + 19 = -21.470910554 Reorder the terms: 19 + x = -21.470910554 Solving 19 + x = -21.470910554 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-19' to each side of the equation. 19 + -19 + x = -21.470910554 + -19 Combine like terms: 19 + -19 = 0 0 + x = -21.470910554 + -19 x = -21.470910554 + -19 Combine like terms: -21.470910554 + -19 = -40.470910554 x = -40.470910554 Simplifying x = -40.470910554

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.470910554, -40.470910554}

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