3x^2-20x=-24

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Solution for 3x^2-20x=-24 equation:


Simplifying
3x2 + -20x = -24

Reorder the terms:
-20x + 3x2 = -24

Solving
-20x + 3x2 = -24

Solving for variable 'x'.

Reorder the terms:
24 + -20x + 3x2 = -24 + 24

Combine like terms: -24 + 24 = 0
24 + -20x + 3x2 = 0

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

Divide each side by '3'.
8 + -6.666666667x + x2 = 0

Move the constant term to the right:

Add '-8' to each side of the equation.
8 + -6.666666667x + -8 + x2 = 0 + -8

Reorder the terms:
8 + -8 + -6.666666667x + x2 = 0 + -8

Combine like terms: 8 + -8 = 0
0 + -6.666666667x + x2 = 0 + -8
-6.666666667x + x2 = 0 + -8

Combine like terms: 0 + -8 = -8
-6.666666667x + x2 = -8

The x term is -6.666666667x.  Take half its coefficient (-3.333333334).
Square it (11.11111112) and add it to both sides.

Add '11.11111112' to each side of the equation.
-6.666666667x + 11.11111112 + x2 = -8 + 11.11111112

Reorder the terms:
11.11111112 + -6.666666667x + x2 = -8 + 11.11111112

Combine like terms: -8 + 11.11111112 = 3.11111112
11.11111112 + -6.666666667x + x2 = 3.11111112

Factor a perfect square on the left side:
(x + -3.333333334)(x + -3.333333334) = 3.11111112

Calculate the square root of the right side: 1.76383421

Break this problem into two subproblems by setting 
(x + -3.333333334) equal to 1.76383421 and -1.76383421.

Subproblem 1

x + -3.333333334 = 1.76383421 Simplifying x + -3.333333334 = 1.76383421 Reorder the terms: -3.333333334 + x = 1.76383421 Solving -3.333333334 + x = 1.76383421 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.333333334' to each side of the equation. -3.333333334 + 3.333333334 + x = 1.76383421 + 3.333333334 Combine like terms: -3.333333334 + 3.333333334 = 0.000000000 0.000000000 + x = 1.76383421 + 3.333333334 x = 1.76383421 + 3.333333334 Combine like terms: 1.76383421 + 3.333333334 = 5.097167544 x = 5.097167544 Simplifying x = 5.097167544

Subproblem 2

x + -3.333333334 = -1.76383421 Simplifying x + -3.333333334 = -1.76383421 Reorder the terms: -3.333333334 + x = -1.76383421 Solving -3.333333334 + x = -1.76383421 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.333333334' to each side of the equation. -3.333333334 + 3.333333334 + x = -1.76383421 + 3.333333334 Combine like terms: -3.333333334 + 3.333333334 = 0.000000000 0.000000000 + x = -1.76383421 + 3.333333334 x = -1.76383421 + 3.333333334 Combine like terms: -1.76383421 + 3.333333334 = 1.569499124 x = 1.569499124 Simplifying x = 1.569499124

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.097167544, 1.569499124}

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