(3x+x^2)=96

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Solution for (3x+x^2)=96 equation:


Simplifying
(3x + x2) = 96

Remove parenthesis around (3x + x2)
3x + x2 = 96

Solving
3x + x2 = 96

Solving for variable 'x'.

Reorder the terms:
-96 + 3x + x2 = 96 + -96

Combine like terms: 96 + -96 = 0
-96 + 3x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '96' to each side of the equation.
-96 + 3x + 96 + x2 = 0 + 96

Reorder the terms:
-96 + 96 + 3x + x2 = 0 + 96

Combine like terms: -96 + 96 = 0
0 + 3x + x2 = 0 + 96
3x + x2 = 0 + 96

Combine like terms: 0 + 96 = 96
3x + x2 = 96

The x term is 3x.  Take half its coefficient (1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
3x + 2.25 + x2 = 96 + 2.25

Reorder the terms:
2.25 + 3x + x2 = 96 + 2.25

Combine like terms: 96 + 2.25 = 98.25
2.25 + 3x + x2 = 98.25

Factor a perfect square on the left side:
(x + 1.5)(x + 1.5) = 98.25

Calculate the square root of the right side: 9.912113801

Break this problem into two subproblems by setting 
(x + 1.5) equal to 9.912113801 and -9.912113801.

Subproblem 1

x + 1.5 = 9.912113801 Simplifying x + 1.5 = 9.912113801 Reorder the terms: 1.5 + x = 9.912113801 Solving 1.5 + x = 9.912113801 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + x = 9.912113801 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = 9.912113801 + -1.5 x = 9.912113801 + -1.5 Combine like terms: 9.912113801 + -1.5 = 8.412113801 x = 8.412113801 Simplifying x = 8.412113801

Subproblem 2

x + 1.5 = -9.912113801 Simplifying x + 1.5 = -9.912113801 Reorder the terms: 1.5 + x = -9.912113801 Solving 1.5 + x = -9.912113801 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + x = -9.912113801 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = -9.912113801 + -1.5 x = -9.912113801 + -1.5 Combine like terms: -9.912113801 + -1.5 = -11.412113801 x = -11.412113801 Simplifying x = -11.412113801

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.412113801, -11.412113801}

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