0=x^2+40x-950

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Solution for 0=x^2+40x-950 equation:


Simplifying
0 = x2 + 40x + -950

Reorder the terms:
0 = -950 + 40x + x2

Solving
0 = -950 + 40x + x2

Solving for variable 'x'.

Combine like terms: 0 + 950 = 950
950 + -40x + -1x2 = -950 + 40x + x2 + 950 + -40x + -1x2

Reorder the terms:
950 + -40x + -1x2 = -950 + 950 + 40x + -40x + x2 + -1x2

Combine like terms: -950 + 950 = 0
950 + -40x + -1x2 = 0 + 40x + -40x + x2 + -1x2
950 + -40x + -1x2 = 40x + -40x + x2 + -1x2

Combine like terms: 40x + -40x = 0
950 + -40x + -1x2 = 0 + x2 + -1x2
950 + -40x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
950 + -40x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-950 + 40x + x2 = 0

Move the constant term to the right:

Add '950' to each side of the equation.
-950 + 40x + 950 + x2 = 0 + 950

Reorder the terms:
-950 + 950 + 40x + x2 = 0 + 950

Combine like terms: -950 + 950 = 0
0 + 40x + x2 = 0 + 950
40x + x2 = 0 + 950

Combine like terms: 0 + 950 = 950
40x + x2 = 950

The x term is 40x.  Take half its coefficient (20).
Square it (400) and add it to both sides.

Add '400' to each side of the equation.
40x + 400 + x2 = 950 + 400

Reorder the terms:
400 + 40x + x2 = 950 + 400

Combine like terms: 950 + 400 = 1350
400 + 40x + x2 = 1350

Factor a perfect square on the left side:
(x + 20)(x + 20) = 1350

Calculate the square root of the right side: 36.742346142

Break this problem into two subproblems by setting 
(x + 20) equal to 36.742346142 and -36.742346142.

Subproblem 1

x + 20 = 36.742346142 Simplifying x + 20 = 36.742346142 Reorder the terms: 20 + x = 36.742346142 Solving 20 + x = 36.742346142 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-20' to each side of the equation. 20 + -20 + x = 36.742346142 + -20 Combine like terms: 20 + -20 = 0 0 + x = 36.742346142 + -20 x = 36.742346142 + -20 Combine like terms: 36.742346142 + -20 = 16.742346142 x = 16.742346142 Simplifying x = 16.742346142

Subproblem 2

x + 20 = -36.742346142 Simplifying x + 20 = -36.742346142 Reorder the terms: 20 + x = -36.742346142 Solving 20 + x = -36.742346142 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-20' to each side of the equation. 20 + -20 + x = -36.742346142 + -20 Combine like terms: 20 + -20 = 0 0 + x = -36.742346142 + -20 x = -36.742346142 + -20 Combine like terms: -36.742346142 + -20 = -56.742346142 x = -56.742346142 Simplifying x = -56.742346142

Solution

The solution to the problem is based on the solutions from the subproblems. x = {16.742346142, -56.742346142}

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