(1.5x^2)+120x-4000=0

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Solution for (1.5x^2)+120x-4000=0 equation:


Simplifying
(1.5x2) + 120x + -4000 = 0

Reorder the terms:
-4000 + 120x + (1.5x2) = 0

Solving
-4000 + 120x + (1.5x2) = 0

Solving for variable 'x'.

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

Divide each side by '1.5'.
-2666.666667 + 80x + x2 = 0

Move the constant term to the right:

Add '2666.666667' to each side of the equation.
-2666.666667 + 80x + 2666.666667 + x2 = 0 + 2666.666667

Reorder the terms:
-2666.666667 + 2666.666667 + 80x + x2 = 0 + 2666.666667

Combine like terms: -2666.666667 + 2666.666667 = 0.000000
0.000000 + 80x + x2 = 0 + 2666.666667
80x + x2 = 0 + 2666.666667

Combine like terms: 0 + 2666.666667 = 2666.666667
80x + x2 = 2666.666667

The x term is 80x.  Take half its coefficient (40).
Square it (1600) and add it to both sides.

Add '1600' to each side of the equation.
80x + 1600 + x2 = 2666.666667 + 1600

Reorder the terms:
1600 + 80x + x2 = 2666.666667 + 1600

Combine like terms: 2666.666667 + 1600 = 4266.666667
1600 + 80x + x2 = 4266.666667

Factor a perfect square on the left side:
((x) + 40)((x) + 40) = 4266.666667

Calculate the square root of the right side: 65.319726477

Break this problem into two subproblems by setting 
((x) + 40) equal to 65.319726477 and -65.319726477.

Subproblem 1

(x) + 40 = 65.319726477 Simplifying (x) + 40 = 65.319726477 x + 40 = 65.319726477 Reorder the terms: 40 + x = 65.319726477 Solving 40 + x = 65.319726477 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-40' to each side of the equation. 40 + -40 + x = 65.319726477 + -40 Combine like terms: 40 + -40 = 0 0 + x = 65.319726477 + -40 x = 65.319726477 + -40 Combine like terms: 65.319726477 + -40 = 25.319726477 x = 25.319726477 Simplifying x = 25.319726477

Subproblem 2

(x) + 40 = -65.319726477 Simplifying (x) + 40 = -65.319726477 x + 40 = -65.319726477 Reorder the terms: 40 + x = -65.319726477 Solving 40 + x = -65.319726477 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-40' to each side of the equation. 40 + -40 + x = -65.319726477 + -40 Combine like terms: 40 + -40 = 0 0 + x = -65.319726477 + -40 x = -65.319726477 + -40 Combine like terms: -65.319726477 + -40 = -105.319726477 x = -105.319726477 Simplifying x = -105.319726477

Solution

The solution to the problem is based on the solutions from the subproblems. x = {25.319726477, -105.319726477}

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