5x(x+4)=5(x+5)

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


Simplifying
5x(x + 4) = 5(x + 5)

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

Reorder the terms:
20x + 5x2 = 5(5 + x)
20x + 5x2 = (5 * 5 + x * 5)
20x + 5x2 = (25 + 5x)

Solving
20x + 5x2 = 25 + 5x

Solving for variable 'x'.

Reorder the terms:
-25 + 20x + -5x + 5x2 = 25 + 5x + -25 + -5x

Combine like terms: 20x + -5x = 15x
-25 + 15x + 5x2 = 25 + 5x + -25 + -5x

Reorder the terms:
-25 + 15x + 5x2 = 25 + -25 + 5x + -5x

Combine like terms: 25 + -25 = 0
-25 + 15x + 5x2 = 0 + 5x + -5x
-25 + 15x + 5x2 = 5x + -5x

Combine like terms: 5x + -5x = 0
-25 + 15x + 5x2 = 0

Factor out the Greatest Common Factor (GCF), '5'.
5(-5 + 3x + x2) = 0

Ignore the factor 5.

Subproblem 1

Set the factor '(-5 + 3x + x2)' equal to zero and attempt to solve: Simplifying -5 + 3x + x2 = 0 Solving -5 + 3x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '5' to each side of the equation. -5 + 3x + 5 + x2 = 0 + 5 Reorder the terms: -5 + 5 + 3x + x2 = 0 + 5 Combine like terms: -5 + 5 = 0 0 + 3x + x2 = 0 + 5 3x + x2 = 0 + 5 Combine like terms: 0 + 5 = 5 3x + x2 = 5 The x term is 3x. Take half its coefficient (1.5). Square it (2.25) and add it to both sides. Add '2.25' to each side of the equation. 3x + 2.25 + x2 = 5 + 2.25 Reorder the terms: 2.25 + 3x + x2 = 5 + 2.25 Combine like terms: 5 + 2.25 = 7.25 2.25 + 3x + x2 = 7.25 Factor a perfect square on the left side: (x + 1.5)(x + 1.5) = 7.25 Calculate the square root of the right side: 2.692582404 Break this problem into two subproblems by setting (x + 1.5) equal to 2.692582404 and -2.692582404.

Subproblem 1

x + 1.5 = 2.692582404 Simplifying x + 1.5 = 2.692582404 Reorder the terms: 1.5 + x = 2.692582404 Solving 1.5 + x = 2.692582404 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + x = 2.692582404 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = 2.692582404 + -1.5 x = 2.692582404 + -1.5 Combine like terms: 2.692582404 + -1.5 = 1.192582404 x = 1.192582404 Simplifying x = 1.192582404

Subproblem 2

x + 1.5 = -2.692582404 Simplifying x + 1.5 = -2.692582404 Reorder the terms: 1.5 + x = -2.692582404 Solving 1.5 + x = -2.692582404 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + x = -2.692582404 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = -2.692582404 + -1.5 x = -2.692582404 + -1.5 Combine like terms: -2.692582404 + -1.5 = -4.192582404 x = -4.192582404 Simplifying x = -4.192582404

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.192582404, -4.192582404}

Solution

x = {1.192582404, -4.192582404}

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