x(2x-3)=26

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Solution for x(2x-3)=26 equation:


Simplifying
x(2x + -3) = 26

Reorder the terms:
x(-3 + 2x) = 26
(-3 * x + 2x * x) = 26
(-3x + 2x2) = 26

Solving
-3x + 2x2 = 26

Solving for variable 'x'.

Reorder the terms:
-26 + -3x + 2x2 = 26 + -26

Combine like terms: 26 + -26 = 0
-26 + -3x + 2x2 = 0

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

Divide each side by '2'.
-13 + -1.5x + x2 = 0

Move the constant term to the right:

Add '13' to each side of the equation.
-13 + -1.5x + 13 + x2 = 0 + 13

Reorder the terms:
-13 + 13 + -1.5x + x2 = 0 + 13

Combine like terms: -13 + 13 = 0
0 + -1.5x + x2 = 0 + 13
-1.5x + x2 = 0 + 13

Combine like terms: 0 + 13 = 13
-1.5x + x2 = 13

The x term is -1.5x.  Take half its coefficient (-0.75).
Square it (0.5625) and add it to both sides.

Add '0.5625' to each side of the equation.
-1.5x + 0.5625 + x2 = 13 + 0.5625

Reorder the terms:
0.5625 + -1.5x + x2 = 13 + 0.5625

Combine like terms: 13 + 0.5625 = 13.5625
0.5625 + -1.5x + x2 = 13.5625

Factor a perfect square on the left side:
(x + -0.75)(x + -0.75) = 13.5625

Calculate the square root of the right side: 3.682729966

Break this problem into two subproblems by setting 
(x + -0.75) equal to 3.682729966 and -3.682729966.

Subproblem 1

x + -0.75 = 3.682729966 Simplifying x + -0.75 = 3.682729966 Reorder the terms: -0.75 + x = 3.682729966 Solving -0.75 + x = 3.682729966 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.75' to each side of the equation. -0.75 + 0.75 + x = 3.682729966 + 0.75 Combine like terms: -0.75 + 0.75 = 0.00 0.00 + x = 3.682729966 + 0.75 x = 3.682729966 + 0.75 Combine like terms: 3.682729966 + 0.75 = 4.432729966 x = 4.432729966 Simplifying x = 4.432729966

Subproblem 2

x + -0.75 = -3.682729966 Simplifying x + -0.75 = -3.682729966 Reorder the terms: -0.75 + x = -3.682729966 Solving -0.75 + x = -3.682729966 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.75' to each side of the equation. -0.75 + 0.75 + x = -3.682729966 + 0.75 Combine like terms: -0.75 + 0.75 = 0.00 0.00 + x = -3.682729966 + 0.75 x = -3.682729966 + 0.75 Combine like terms: -3.682729966 + 0.75 = -2.932729966 x = -2.932729966 Simplifying x = -2.932729966

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.432729966, -2.932729966}

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