20x(3x-28)=537

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Solution for 20x(3x-28)=537 equation:


Simplifying
20x(3x + -28) = 537

Reorder the terms:
20x(-28 + 3x) = 537
(-28 * 20x + 3x * 20x) = 537
(-560x + 60x2) = 537

Solving
-560x + 60x2 = 537

Solving for variable 'x'.

Reorder the terms:
-537 + -560x + 60x2 = 537 + -537

Combine like terms: 537 + -537 = 0
-537 + -560x + 60x2 = 0

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

Divide each side by '60'.
-8.95 + -9.333333333x + x2 = 0.0

Move the constant term to the right:

Add '8.95' to each side of the equation.
-8.95 + -9.333333333x + 8.95 + x2 = 0.0 + 8.95

Reorder the terms:
-8.95 + 8.95 + -9.333333333x + x2 = 0.0 + 8.95

Combine like terms: -8.95 + 8.95 = 0.00
0.00 + -9.333333333x + x2 = 0.0 + 8.95
-9.333333333x + x2 = 0.0 + 8.95

Combine like terms: 0.0 + 8.95 = 8.95
-9.333333333x + x2 = 8.95

The x term is -9.333333333x.  Take half its coefficient (-4.666666667).
Square it (21.77777778) and add it to both sides.

Add '21.77777778' to each side of the equation.
-9.333333333x + 21.77777778 + x2 = 8.95 + 21.77777778

Reorder the terms:
21.77777778 + -9.333333333x + x2 = 8.95 + 21.77777778

Combine like terms: 8.95 + 21.77777778 = 30.72777778
21.77777778 + -9.333333333x + x2 = 30.72777778

Factor a perfect square on the left side:
(x + -4.666666667)(x + -4.666666667) = 30.72777778

Calculate the square root of the right side: 5.543264181

Break this problem into two subproblems by setting 
(x + -4.666666667) equal to 5.543264181 and -5.543264181.

Subproblem 1

x + -4.666666667 = 5.543264181 Simplifying x + -4.666666667 = 5.543264181 Reorder the terms: -4.666666667 + x = 5.543264181 Solving -4.666666667 + x = 5.543264181 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.666666667' to each side of the equation. -4.666666667 + 4.666666667 + x = 5.543264181 + 4.666666667 Combine like terms: -4.666666667 + 4.666666667 = 0.000000000 0.000000000 + x = 5.543264181 + 4.666666667 x = 5.543264181 + 4.666666667 Combine like terms: 5.543264181 + 4.666666667 = 10.209930848 x = 10.209930848 Simplifying x = 10.209930848

Subproblem 2

x + -4.666666667 = -5.543264181 Simplifying x + -4.666666667 = -5.543264181 Reorder the terms: -4.666666667 + x = -5.543264181 Solving -4.666666667 + x = -5.543264181 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.666666667' to each side of the equation. -4.666666667 + 4.666666667 + x = -5.543264181 + 4.666666667 Combine like terms: -4.666666667 + 4.666666667 = 0.000000000 0.000000000 + x = -5.543264181 + 4.666666667 x = -5.543264181 + 4.666666667 Combine like terms: -5.543264181 + 4.666666667 = -0.876597514 x = -0.876597514 Simplifying x = -0.876597514

Solution

The solution to the problem is based on the solutions from the subproblems. x = {10.209930848, -0.876597514}

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