3x^2-53x=-56

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Solution for 3x^2-53x=-56 equation:


Simplifying
3x2 + -53x = -56

Reorder the terms:
-53x + 3x2 = -56

Solving
-53x + 3x2 = -56

Solving for variable 'x'.

Reorder the terms:
56 + -53x + 3x2 = -56 + 56

Combine like terms: -56 + 56 = 0
56 + -53x + 3x2 = 0

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

Divide each side by '3'.
18.66666667 + -17.66666667x + x2 = 0

Move the constant term to the right:

Add '-18.66666667' to each side of the equation.
18.66666667 + -17.66666667x + -18.66666667 + x2 = 0 + -18.66666667

Reorder the terms:
18.66666667 + -18.66666667 + -17.66666667x + x2 = 0 + -18.66666667

Combine like terms: 18.66666667 + -18.66666667 = 0.00000000
0.00000000 + -17.66666667x + x2 = 0 + -18.66666667
-17.66666667x + x2 = 0 + -18.66666667

Combine like terms: 0 + -18.66666667 = -18.66666667
-17.66666667x + x2 = -18.66666667

The x term is -17.66666667x.  Take half its coefficient (-8.833333335).
Square it (78.02777781) and add it to both sides.

Add '78.02777781' to each side of the equation.
-17.66666667x + 78.02777781 + x2 = -18.66666667 + 78.02777781

Reorder the terms:
78.02777781 + -17.66666667x + x2 = -18.66666667 + 78.02777781

Combine like terms: -18.66666667 + 78.02777781 = 59.36111114
78.02777781 + -17.66666667x + x2 = 59.36111114

Factor a perfect square on the left side:
(x + -8.833333335)(x + -8.833333335) = 59.36111114

Calculate the square root of the right side: 7.704616223

Break this problem into two subproblems by setting 
(x + -8.833333335) equal to 7.704616223 and -7.704616223.

Subproblem 1

x + -8.833333335 = 7.704616223 Simplifying x + -8.833333335 = 7.704616223 Reorder the terms: -8.833333335 + x = 7.704616223 Solving -8.833333335 + x = 7.704616223 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '8.833333335' to each side of the equation. -8.833333335 + 8.833333335 + x = 7.704616223 + 8.833333335 Combine like terms: -8.833333335 + 8.833333335 = 0.000000000 0.000000000 + x = 7.704616223 + 8.833333335 x = 7.704616223 + 8.833333335 Combine like terms: 7.704616223 + 8.833333335 = 16.537949558 x = 16.537949558 Simplifying x = 16.537949558

Subproblem 2

x + -8.833333335 = -7.704616223 Simplifying x + -8.833333335 = -7.704616223 Reorder the terms: -8.833333335 + x = -7.704616223 Solving -8.833333335 + x = -7.704616223 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '8.833333335' to each side of the equation. -8.833333335 + 8.833333335 + x = -7.704616223 + 8.833333335 Combine like terms: -8.833333335 + 8.833333335 = 0.000000000 0.000000000 + x = -7.704616223 + 8.833333335 x = -7.704616223 + 8.833333335 Combine like terms: -7.704616223 + 8.833333335 = 1.128717112 x = 1.128717112 Simplifying x = 1.128717112

Solution

The solution to the problem is based on the solutions from the subproblems. x = {16.537949558, 1.128717112}

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