0=x^2+95x-40

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Solution for 0=x^2+95x-40 equation:


Simplifying
0 = x2 + 95x + -40

Reorder the terms:
0 = -40 + 95x + x2

Solving
0 = -40 + 95x + x2

Solving for variable 'x'.

Combine like terms: 0 + 40 = 40
40 + -95x + -1x2 = -40 + 95x + x2 + 40 + -95x + -1x2

Reorder the terms:
40 + -95x + -1x2 = -40 + 40 + 95x + -95x + x2 + -1x2

Combine like terms: -40 + 40 = 0
40 + -95x + -1x2 = 0 + 95x + -95x + x2 + -1x2
40 + -95x + -1x2 = 95x + -95x + x2 + -1x2

Combine like terms: 95x + -95x = 0
40 + -95x + -1x2 = 0 + x2 + -1x2
40 + -95x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
40 + -95x + -1x2 = 0

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

Divide each side by '-1'.
-40 + 95x + x2 = 0

Move the constant term to the right:

Add '40' to each side of the equation.
-40 + 95x + 40 + x2 = 0 + 40

Reorder the terms:
-40 + 40 + 95x + x2 = 0 + 40

Combine like terms: -40 + 40 = 0
0 + 95x + x2 = 0 + 40
95x + x2 = 0 + 40

Combine like terms: 0 + 40 = 40
95x + x2 = 40

The x term is 95x.  Take half its coefficient (47.5).
Square it (2256.25) and add it to both sides.

Add '2256.25' to each side of the equation.
95x + 2256.25 + x2 = 40 + 2256.25

Reorder the terms:
2256.25 + 95x + x2 = 40 + 2256.25

Combine like terms: 40 + 2256.25 = 2296.25
2256.25 + 95x + x2 = 2296.25

Factor a perfect square on the left side:
(x + 47.5)(x + 47.5) = 2296.25

Calculate the square root of the right side: 47.919202831

Break this problem into two subproblems by setting 
(x + 47.5) equal to 47.919202831 and -47.919202831.

Subproblem 1

x + 47.5 = 47.919202831 Simplifying x + 47.5 = 47.919202831 Reorder the terms: 47.5 + x = 47.919202831 Solving 47.5 + x = 47.919202831 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-47.5' to each side of the equation. 47.5 + -47.5 + x = 47.919202831 + -47.5 Combine like terms: 47.5 + -47.5 = 0.0 0.0 + x = 47.919202831 + -47.5 x = 47.919202831 + -47.5 Combine like terms: 47.919202831 + -47.5 = 0.419202831 x = 0.419202831 Simplifying x = 0.419202831

Subproblem 2

x + 47.5 = -47.919202831 Simplifying x + 47.5 = -47.919202831 Reorder the terms: 47.5 + x = -47.919202831 Solving 47.5 + x = -47.919202831 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-47.5' to each side of the equation. 47.5 + -47.5 + x = -47.919202831 + -47.5 Combine like terms: 47.5 + -47.5 = 0.0 0.0 + x = -47.919202831 + -47.5 x = -47.919202831 + -47.5 Combine like terms: -47.919202831 + -47.5 = -95.419202831 x = -95.419202831 Simplifying x = -95.419202831

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.419202831, -95.419202831}

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