3x^2+8x-7500=0

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Solution for 3x^2+8x-7500=0 equation:


Simplifying
3x2 + 8x + -7500 = 0

Reorder the terms:
-7500 + 8x + 3x2 = 0

Solving
-7500 + 8x + 3x2 = 0

Solving for variable 'x'.

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

Divide each side by '3'.
-2500 + 2.666666667x + x2 = 0

Move the constant term to the right:

Add '2500' to each side of the equation.
-2500 + 2.666666667x + 2500 + x2 = 0 + 2500

Reorder the terms:
-2500 + 2500 + 2.666666667x + x2 = 0 + 2500

Combine like terms: -2500 + 2500 = 0
0 + 2.666666667x + x2 = 0 + 2500
2.666666667x + x2 = 0 + 2500

Combine like terms: 0 + 2500 = 2500
2.666666667x + x2 = 2500

The x term is 2.666666667x.  Take half its coefficient (1.333333334).
Square it (1.777777780) and add it to both sides.

Add '1.777777780' to each side of the equation.
2.666666667x + 1.777777780 + x2 = 2500 + 1.777777780

Reorder the terms:
1.777777780 + 2.666666667x + x2 = 2500 + 1.777777780

Combine like terms: 2500 + 1.777777780 = 2501.77777778
1.777777780 + 2.666666667x + x2 = 2501.77777778

Factor a perfect square on the left side:
(x + 1.333333334)(x + 1.333333334) = 2501.77777778

Calculate the square root of the right side: 50.017774618

Break this problem into two subproblems by setting 
(x + 1.333333334) equal to 50.017774618 and -50.017774618.

Subproblem 1

x + 1.333333334 = 50.017774618 Simplifying x + 1.333333334 = 50.017774618 Reorder the terms: 1.333333334 + x = 50.017774618 Solving 1.333333334 + x = 50.017774618 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.333333334' to each side of the equation. 1.333333334 + -1.333333334 + x = 50.017774618 + -1.333333334 Combine like terms: 1.333333334 + -1.333333334 = 0.000000000 0.000000000 + x = 50.017774618 + -1.333333334 x = 50.017774618 + -1.333333334 Combine like terms: 50.017774618 + -1.333333334 = 48.684441284 x = 48.684441284 Simplifying x = 48.684441284

Subproblem 2

x + 1.333333334 = -50.017774618 Simplifying x + 1.333333334 = -50.017774618 Reorder the terms: 1.333333334 + x = -50.017774618 Solving 1.333333334 + x = -50.017774618 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.333333334' to each side of the equation. 1.333333334 + -1.333333334 + x = -50.017774618 + -1.333333334 Combine like terms: 1.333333334 + -1.333333334 = 0.000000000 0.000000000 + x = -50.017774618 + -1.333333334 x = -50.017774618 + -1.333333334 Combine like terms: -50.017774618 + -1.333333334 = -51.351107952 x = -51.351107952 Simplifying x = -51.351107952

Solution

The solution to the problem is based on the solutions from the subproblems. x = {48.684441284, -51.351107952}

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