40x-x^2-96=0

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Solution for 40x-x^2-96=0 equation:


Simplifying
40x + -1x2 + -96 = 0

Reorder the terms:
-96 + 40x + -1x2 = 0

Solving
-96 + 40x + -1x2 = 0

Solving for variable 'x'.

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

Divide each side by '-1'.
96 + -40x + x2 = 0

Move the constant term to the right:

Add '-96' to each side of the equation.
96 + -40x + -96 + x2 = 0 + -96

Reorder the terms:
96 + -96 + -40x + x2 = 0 + -96

Combine like terms: 96 + -96 = 0
0 + -40x + x2 = 0 + -96
-40x + x2 = 0 + -96

Combine like terms: 0 + -96 = -96
-40x + x2 = -96

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 = -96 + 400

Reorder the terms:
400 + -40x + x2 = -96 + 400

Combine like terms: -96 + 400 = 304
400 + -40x + x2 = 304

Factor a perfect square on the left side:
(x + -20)(x + -20) = 304

Calculate the square root of the right side: 17.435595774

Break this problem into two subproblems by setting 
(x + -20) equal to 17.435595774 and -17.435595774.

Subproblem 1

x + -20 = 17.435595774 Simplifying x + -20 = 17.435595774 Reorder the terms: -20 + x = 17.435595774 Solving -20 + x = 17.435595774 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 = 17.435595774 + 20 Combine like terms: -20 + 20 = 0 0 + x = 17.435595774 + 20 x = 17.435595774 + 20 Combine like terms: 17.435595774 + 20 = 37.435595774 x = 37.435595774 Simplifying x = 37.435595774

Subproblem 2

x + -20 = -17.435595774 Simplifying x + -20 = -17.435595774 Reorder the terms: -20 + x = -17.435595774 Solving -20 + x = -17.435595774 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 = -17.435595774 + 20 Combine like terms: -20 + 20 = 0 0 + x = -17.435595774 + 20 x = -17.435595774 + 20 Combine like terms: -17.435595774 + 20 = 2.564404226 x = 2.564404226 Simplifying x = 2.564404226

Solution

The solution to the problem is based on the solutions from the subproblems. x = {37.435595774, 2.564404226}

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