3x^2-4x=1500

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Solution for 3x^2-4x=1500 equation:


Simplifying
3x2 + -4x = 1500

Reorder the terms:
-4x + 3x2 = 1500

Solving
-4x + 3x2 = 1500

Solving for variable 'x'.

Reorder the terms:
-1500 + -4x + 3x2 = 1500 + -1500

Combine like terms: 1500 + -1500 = 0
-1500 + -4x + 3x2 = 0

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

Divide each side by '3'.
-500 + -1.333333333x + x2 = 0

Move the constant term to the right:

Add '500' to each side of the equation.
-500 + -1.333333333x + 500 + x2 = 0 + 500

Reorder the terms:
-500 + 500 + -1.333333333x + x2 = 0 + 500

Combine like terms: -500 + 500 = 0
0 + -1.333333333x + x2 = 0 + 500
-1.333333333x + x2 = 0 + 500

Combine like terms: 0 + 500 = 500
-1.333333333x + x2 = 500

The x term is -1.333333333x.  Take half its coefficient (-0.6666666665).
Square it (0.4444444442) and add it to both sides.

Add '0.4444444442' to each side of the equation.
-1.333333333x + 0.4444444442 + x2 = 500 + 0.4444444442

Reorder the terms:
0.4444444442 + -1.333333333x + x2 = 500 + 0.4444444442

Combine like terms: 500 + 0.4444444442 = 500.4444444442
0.4444444442 + -1.333333333x + x2 = 500.4444444442

Factor a perfect square on the left side:
(x + -0.6666666665)(x + -0.6666666665) = 500.4444444442

Calculate the square root of the right side: 22.370615647

Break this problem into two subproblems by setting 
(x + -0.6666666665) equal to 22.370615647 and -22.370615647.

Subproblem 1

x + -0.6666666665 = 22.370615647 Simplifying x + -0.6666666665 = 22.370615647 Reorder the terms: -0.6666666665 + x = 22.370615647 Solving -0.6666666665 + x = 22.370615647 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.6666666665' to each side of the equation. -0.6666666665 + 0.6666666665 + x = 22.370615647 + 0.6666666665 Combine like terms: -0.6666666665 + 0.6666666665 = 0.0000000000 0.0000000000 + x = 22.370615647 + 0.6666666665 x = 22.370615647 + 0.6666666665 Combine like terms: 22.370615647 + 0.6666666665 = 23.0372823135 x = 23.0372823135 Simplifying x = 23.0372823135

Subproblem 2

x + -0.6666666665 = -22.370615647 Simplifying x + -0.6666666665 = -22.370615647 Reorder the terms: -0.6666666665 + x = -22.370615647 Solving -0.6666666665 + x = -22.370615647 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.6666666665' to each side of the equation. -0.6666666665 + 0.6666666665 + x = -22.370615647 + 0.6666666665 Combine like terms: -0.6666666665 + 0.6666666665 = 0.0000000000 0.0000000000 + x = -22.370615647 + 0.6666666665 x = -22.370615647 + 0.6666666665 Combine like terms: -22.370615647 + 0.6666666665 = -21.7039489805 x = -21.7039489805 Simplifying x = -21.7039489805

Solution

The solution to the problem is based on the solutions from the subproblems. x = {23.0372823135, -21.7039489805}

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