3x^2-23x=30

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Solution for 3x^2-23x=30 equation:


Simplifying
3x2 + -23x = 30

Reorder the terms:
-23x + 3x2 = 30

Solving
-23x + 3x2 = 30

Solving for variable 'x'.

Reorder the terms:
-30 + -23x + 3x2 = 30 + -30

Combine like terms: 30 + -30 = 0
-30 + -23x + 3x2 = 0

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

Divide each side by '3'.
-10 + -7.666666667x + x2 = 0

Move the constant term to the right:

Add '10' to each side of the equation.
-10 + -7.666666667x + 10 + x2 = 0 + 10

Reorder the terms:
-10 + 10 + -7.666666667x + x2 = 0 + 10

Combine like terms: -10 + 10 = 0
0 + -7.666666667x + x2 = 0 + 10
-7.666666667x + x2 = 0 + 10

Combine like terms: 0 + 10 = 10
-7.666666667x + x2 = 10

The x term is -7.666666667x.  Take half its coefficient (-3.833333334).
Square it (14.69444445) and add it to both sides.

Add '14.69444445' to each side of the equation.
-7.666666667x + 14.69444445 + x2 = 10 + 14.69444445

Reorder the terms:
14.69444445 + -7.666666667x + x2 = 10 + 14.69444445

Combine like terms: 10 + 14.69444445 = 24.69444445
14.69444445 + -7.666666667x + x2 = 24.69444445

Factor a perfect square on the left side:
(x + -3.833333334)(x + -3.833333334) = 24.69444445

Calculate the square root of the right side: 4.969350506

Break this problem into two subproblems by setting 
(x + -3.833333334) equal to 4.969350506 and -4.969350506.

Subproblem 1

x + -3.833333334 = 4.969350506 Simplifying x + -3.833333334 = 4.969350506 Reorder the terms: -3.833333334 + x = 4.969350506 Solving -3.833333334 + x = 4.969350506 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.833333334' to each side of the equation. -3.833333334 + 3.833333334 + x = 4.969350506 + 3.833333334 Combine like terms: -3.833333334 + 3.833333334 = 0.000000000 0.000000000 + x = 4.969350506 + 3.833333334 x = 4.969350506 + 3.833333334 Combine like terms: 4.969350506 + 3.833333334 = 8.80268384 x = 8.80268384 Simplifying x = 8.80268384

Subproblem 2

x + -3.833333334 = -4.969350506 Simplifying x + -3.833333334 = -4.969350506 Reorder the terms: -3.833333334 + x = -4.969350506 Solving -3.833333334 + x = -4.969350506 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.833333334' to each side of the equation. -3.833333334 + 3.833333334 + x = -4.969350506 + 3.833333334 Combine like terms: -3.833333334 + 3.833333334 = 0.000000000 0.000000000 + x = -4.969350506 + 3.833333334 x = -4.969350506 + 3.833333334 Combine like terms: -4.969350506 + 3.833333334 = -1.136017172 x = -1.136017172 Simplifying x = -1.136017172

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.80268384, -1.136017172}

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