x^2+5x=1900

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Solution for x^2+5x=1900 equation:


Simplifying
x2 + 5x = 1900

Reorder the terms:
5x + x2 = 1900

Solving
5x + x2 = 1900

Solving for variable 'x'.

Reorder the terms:
-1900 + 5x + x2 = 1900 + -1900

Combine like terms: 1900 + -1900 = 0
-1900 + 5x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '1900' to each side of the equation.
-1900 + 5x + 1900 + x2 = 0 + 1900

Reorder the terms:
-1900 + 1900 + 5x + x2 = 0 + 1900

Combine like terms: -1900 + 1900 = 0
0 + 5x + x2 = 0 + 1900
5x + x2 = 0 + 1900

Combine like terms: 0 + 1900 = 1900
5x + x2 = 1900

The x term is 5x.  Take half its coefficient (2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
5x + 6.25 + x2 = 1900 + 6.25

Reorder the terms:
6.25 + 5x + x2 = 1900 + 6.25

Combine like terms: 1900 + 6.25 = 1906.25
6.25 + 5x + x2 = 1906.25

Factor a perfect square on the left side:
(x + 2.5)(x + 2.5) = 1906.25

Calculate the square root of the right side: 43.660622991

Break this problem into two subproblems by setting 
(x + 2.5) equal to 43.660622991 and -43.660622991.

Subproblem 1

x + 2.5 = 43.660622991 Simplifying x + 2.5 = 43.660622991 Reorder the terms: 2.5 + x = 43.660622991 Solving 2.5 + x = 43.660622991 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + x = 43.660622991 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = 43.660622991 + -2.5 x = 43.660622991 + -2.5 Combine like terms: 43.660622991 + -2.5 = 41.160622991 x = 41.160622991 Simplifying x = 41.160622991

Subproblem 2

x + 2.5 = -43.660622991 Simplifying x + 2.5 = -43.660622991 Reorder the terms: 2.5 + x = -43.660622991 Solving 2.5 + x = -43.660622991 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + x = -43.660622991 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = -43.660622991 + -2.5 x = -43.660622991 + -2.5 Combine like terms: -43.660622991 + -2.5 = -46.160622991 x = -46.160622991 Simplifying x = -46.160622991

Solution

The solution to the problem is based on the solutions from the subproblems. x = {41.160622991, -46.160622991}

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