x(2x-4)=35

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Solution for x(2x-4)=35 equation:


Simplifying
x(2x + -4) = 35

Reorder the terms:
x(-4 + 2x) = 35
(-4 * x + 2x * x) = 35
(-4x + 2x2) = 35

Solving
-4x + 2x2 = 35

Solving for variable 'x'.

Reorder the terms:
-35 + -4x + 2x2 = 35 + -35

Combine like terms: 35 + -35 = 0
-35 + -4x + 2x2 = 0

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

Divide each side by '2'.
-17.5 + -2x + x2 = 0

Move the constant term to the right:

Add '17.5' to each side of the equation.
-17.5 + -2x + 17.5 + x2 = 0 + 17.5

Reorder the terms:
-17.5 + 17.5 + -2x + x2 = 0 + 17.5

Combine like terms: -17.5 + 17.5 = 0.0
0.0 + -2x + x2 = 0 + 17.5
-2x + x2 = 0 + 17.5

Combine like terms: 0 + 17.5 = 17.5
-2x + x2 = 17.5

The x term is -2x.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2x + 1 + x2 = 17.5 + 1

Reorder the terms:
1 + -2x + x2 = 17.5 + 1

Combine like terms: 17.5 + 1 = 18.5
1 + -2x + x2 = 18.5

Factor a perfect square on the left side:
(x + -1)(x + -1) = 18.5

Calculate the square root of the right side: 4.301162634

Break this problem into two subproblems by setting 
(x + -1) equal to 4.301162634 and -4.301162634.

Subproblem 1

x + -1 = 4.301162634 Simplifying x + -1 = 4.301162634 Reorder the terms: -1 + x = 4.301162634 Solving -1 + x = 4.301162634 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = 4.301162634 + 1 Combine like terms: -1 + 1 = 0 0 + x = 4.301162634 + 1 x = 4.301162634 + 1 Combine like terms: 4.301162634 + 1 = 5.301162634 x = 5.301162634 Simplifying x = 5.301162634

Subproblem 2

x + -1 = -4.301162634 Simplifying x + -1 = -4.301162634 Reorder the terms: -1 + x = -4.301162634 Solving -1 + x = -4.301162634 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = -4.301162634 + 1 Combine like terms: -1 + 1 = 0 0 + x = -4.301162634 + 1 x = -4.301162634 + 1 Combine like terms: -4.301162634 + 1 = -3.301162634 x = -3.301162634 Simplifying x = -3.301162634

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.301162634, -3.301162634}

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