5x(x-4)=5

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Solution for 5x(x-4)=5 equation:


Simplifying
5x(x + -4) = 5

Reorder the terms:
5x(-4 + x) = 5
(-4 * 5x + x * 5x) = 5
(-20x + 5x2) = 5

Solving
-20x + 5x2 = 5

Solving for variable 'x'.

Reorder the terms:
-5 + -20x + 5x2 = 5 + -5

Combine like terms: 5 + -5 = 0
-5 + -20x + 5x2 = 0

Factor out the Greatest Common Factor (GCF), '5'.
5(-1 + -4x + x2) = 0

Ignore the factor 5.

Subproblem 1

Set the factor '(-1 + -4x + x2)' equal to zero and attempt to solve: Simplifying -1 + -4x + x2 = 0 Solving -1 + -4x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '1' to each side of the equation. -1 + -4x + 1 + x2 = 0 + 1 Reorder the terms: -1 + 1 + -4x + x2 = 0 + 1 Combine like terms: -1 + 1 = 0 0 + -4x + x2 = 0 + 1 -4x + x2 = 0 + 1 Combine like terms: 0 + 1 = 1 -4x + x2 = 1 The x term is -4x. Take half its coefficient (-2). Square it (4) and add it to both sides. Add '4' to each side of the equation. -4x + 4 + x2 = 1 + 4 Reorder the terms: 4 + -4x + x2 = 1 + 4 Combine like terms: 1 + 4 = 5 4 + -4x + x2 = 5 Factor a perfect square on the left side: (x + -2)(x + -2) = 5 Calculate the square root of the right side: 2.236067978 Break this problem into two subproblems by setting (x + -2) equal to 2.236067978 and -2.236067978.

Subproblem 1

x + -2 = 2.236067978 Simplifying x + -2 = 2.236067978 Reorder the terms: -2 + x = 2.236067978 Solving -2 + x = 2.236067978 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + x = 2.236067978 + 2 Combine like terms: -2 + 2 = 0 0 + x = 2.236067978 + 2 x = 2.236067978 + 2 Combine like terms: 2.236067978 + 2 = 4.236067978 x = 4.236067978 Simplifying x = 4.236067978

Subproblem 2

x + -2 = -2.236067978 Simplifying x + -2 = -2.236067978 Reorder the terms: -2 + x = -2.236067978 Solving -2 + x = -2.236067978 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + x = -2.236067978 + 2 Combine like terms: -2 + 2 = 0 0 + x = -2.236067978 + 2 x = -2.236067978 + 2 Combine like terms: -2.236067978 + 2 = -0.236067978 x = -0.236067978 Simplifying x = -0.236067978

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.236067978, -0.236067978}

Solution

x = {4.236067978, -0.236067978}

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