x(10x-13)=27

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Solution for x(10x-13)=27 equation:


Simplifying
x(10x + -13) = 27

Reorder the terms:
x(-13 + 10x) = 27
(-13 * x + 10x * x) = 27
(-13x + 10x2) = 27

Solving
-13x + 10x2 = 27

Solving for variable 'x'.

Reorder the terms:
-27 + -13x + 10x2 = 27 + -27

Combine like terms: 27 + -27 = 0
-27 + -13x + 10x2 = 0

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

Divide each side by '10'.
-2.7 + -1.3x + x2 = 0

Move the constant term to the right:

Add '2.7' to each side of the equation.
-2.7 + -1.3x + 2.7 + x2 = 0 + 2.7

Reorder the terms:
-2.7 + 2.7 + -1.3x + x2 = 0 + 2.7

Combine like terms: -2.7 + 2.7 = 0.0
0.0 + -1.3x + x2 = 0 + 2.7
-1.3x + x2 = 0 + 2.7

Combine like terms: 0 + 2.7 = 2.7
-1.3x + x2 = 2.7

The x term is -1.3x.  Take half its coefficient (-0.65).
Square it (0.4225) and add it to both sides.

Add '0.4225' to each side of the equation.
-1.3x + 0.4225 + x2 = 2.7 + 0.4225

Reorder the terms:
0.4225 + -1.3x + x2 = 2.7 + 0.4225

Combine like terms: 2.7 + 0.4225 = 3.1225
0.4225 + -1.3x + x2 = 3.1225

Factor a perfect square on the left side:
(x + -0.65)(x + -0.65) = 3.1225

Calculate the square root of the right side: 1.767059705

Break this problem into two subproblems by setting 
(x + -0.65) equal to 1.767059705 and -1.767059705.

Subproblem 1

x + -0.65 = 1.767059705 Simplifying x + -0.65 = 1.767059705 Reorder the terms: -0.65 + x = 1.767059705 Solving -0.65 + x = 1.767059705 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.65' to each side of the equation. -0.65 + 0.65 + x = 1.767059705 + 0.65 Combine like terms: -0.65 + 0.65 = 0.00 0.00 + x = 1.767059705 + 0.65 x = 1.767059705 + 0.65 Combine like terms: 1.767059705 + 0.65 = 2.417059705 x = 2.417059705 Simplifying x = 2.417059705

Subproblem 2

x + -0.65 = -1.767059705 Simplifying x + -0.65 = -1.767059705 Reorder the terms: -0.65 + x = -1.767059705 Solving -0.65 + x = -1.767059705 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.65' to each side of the equation. -0.65 + 0.65 + x = -1.767059705 + 0.65 Combine like terms: -0.65 + 0.65 = 0.00 0.00 + x = -1.767059705 + 0.65 x = -1.767059705 + 0.65 Combine like terms: -1.767059705 + 0.65 = -1.117059705 x = -1.117059705 Simplifying x = -1.117059705

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.417059705, -1.117059705}

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