30x^2-131x+70=0

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Solution for 30x^2-131x+70=0 equation:


Simplifying
30x2 + -131x + 70 = 0

Reorder the terms:
70 + -131x + 30x2 = 0

Solving
70 + -131x + 30x2 = 0

Solving for variable 'x'.

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

Divide each side by '30'.
2.333333333 + -4.366666667x + x2 = 0

Move the constant term to the right:

Add '-2.333333333' to each side of the equation.
2.333333333 + -4.366666667x + -2.333333333 + x2 = 0 + -2.333333333

Reorder the terms:
2.333333333 + -2.333333333 + -4.366666667x + x2 = 0 + -2.333333333

Combine like terms: 2.333333333 + -2.333333333 = 0.000000000
0.000000000 + -4.366666667x + x2 = 0 + -2.333333333
-4.366666667x + x2 = 0 + -2.333333333

Combine like terms: 0 + -2.333333333 = -2.333333333
-4.366666667x + x2 = -2.333333333

The x term is -4.366666667x.  Take half its coefficient (-2.183333334).
Square it (4.766944447) and add it to both sides.

Add '4.766944447' to each side of the equation.
-4.366666667x + 4.766944447 + x2 = -2.333333333 + 4.766944447

Reorder the terms:
4.766944447 + -4.366666667x + x2 = -2.333333333 + 4.766944447

Combine like terms: -2.333333333 + 4.766944447 = 2.433611114
4.766944447 + -4.366666667x + x2 = 2.433611114

Factor a perfect square on the left side:
(x + -2.183333334)(x + -2.183333334) = 2.433611114

Calculate the square root of the right side: 1.560003562

Break this problem into two subproblems by setting 
(x + -2.183333334) equal to 1.560003562 and -1.560003562.

Subproblem 1

x + -2.183333334 = 1.560003562 Simplifying x + -2.183333334 = 1.560003562 Reorder the terms: -2.183333334 + x = 1.560003562 Solving -2.183333334 + x = 1.560003562 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.183333334' to each side of the equation. -2.183333334 + 2.183333334 + x = 1.560003562 + 2.183333334 Combine like terms: -2.183333334 + 2.183333334 = 0.000000000 0.000000000 + x = 1.560003562 + 2.183333334 x = 1.560003562 + 2.183333334 Combine like terms: 1.560003562 + 2.183333334 = 3.743336896 x = 3.743336896 Simplifying x = 3.743336896

Subproblem 2

x + -2.183333334 = -1.560003562 Simplifying x + -2.183333334 = -1.560003562 Reorder the terms: -2.183333334 + x = -1.560003562 Solving -2.183333334 + x = -1.560003562 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.183333334' to each side of the equation. -2.183333334 + 2.183333334 + x = -1.560003562 + 2.183333334 Combine like terms: -2.183333334 + 2.183333334 = 0.000000000 0.000000000 + x = -1.560003562 + 2.183333334 x = -1.560003562 + 2.183333334 Combine like terms: -1.560003562 + 2.183333334 = 0.623329772 x = 0.623329772 Simplifying x = 0.623329772

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.743336896, 0.623329772}

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