10x(2x-4)=20

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Solution for 10x(2x-4)=20 equation:


Simplifying
10x(2x + -4) = 20

Reorder the terms:
10x(-4 + 2x) = 20
(-4 * 10x + 2x * 10x) = 20
(-40x + 20x2) = 20

Solving
-40x + 20x2 = 20

Solving for variable 'x'.

Reorder the terms:
-20 + -40x + 20x2 = 20 + -20

Combine like terms: 20 + -20 = 0
-20 + -40x + 20x2 = 0

Factor out the Greatest Common Factor (GCF), '20'.
20(-1 + -2x + x2) = 0

Ignore the factor 20.

Subproblem 1

Set the factor '(-1 + -2x + x2)' equal to zero and attempt to solve: Simplifying -1 + -2x + x2 = 0 Solving -1 + -2x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '1' to each side of the equation. -1 + -2x + 1 + x2 = 0 + 1 Reorder the terms: -1 + 1 + -2x + x2 = 0 + 1 Combine like terms: -1 + 1 = 0 0 + -2x + x2 = 0 + 1 -2x + x2 = 0 + 1 Combine like terms: 0 + 1 = 1 -2x + x2 = 1 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 = 1 + 1 Reorder the terms: 1 + -2x + x2 = 1 + 1 Combine like terms: 1 + 1 = 2 1 + -2x + x2 = 2 Factor a perfect square on the left side: (x + -1)(x + -1) = 2 Calculate the square root of the right side: 1.414213562 Break this problem into two subproblems by setting (x + -1) equal to 1.414213562 and -1.414213562.

Subproblem 1

x + -1 = 1.414213562 Simplifying x + -1 = 1.414213562 Reorder the terms: -1 + x = 1.414213562 Solving -1 + x = 1.414213562 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 = 1.414213562 + 1 Combine like terms: -1 + 1 = 0 0 + x = 1.414213562 + 1 x = 1.414213562 + 1 Combine like terms: 1.414213562 + 1 = 2.414213562 x = 2.414213562 Simplifying x = 2.414213562

Subproblem 2

x + -1 = -1.414213562 Simplifying x + -1 = -1.414213562 Reorder the terms: -1 + x = -1.414213562 Solving -1 + x = -1.414213562 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 = -1.414213562 + 1 Combine like terms: -1 + 1 = 0 0 + x = -1.414213562 + 1 x = -1.414213562 + 1 Combine like terms: -1.414213562 + 1 = -0.414213562 x = -0.414213562 Simplifying x = -0.414213562

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.414213562, -0.414213562}

Solution

x = {2.414213562, -0.414213562}

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