4x(5x+1)=500

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Solution for 4x(5x+1)=500 equation:


Simplifying
4x(5x + 1) = 500

Reorder the terms:
4x(1 + 5x) = 500
(1 * 4x + 5x * 4x) = 500
(4x + 20x2) = 500

Solving
4x + 20x2 = 500

Solving for variable 'x'.

Reorder the terms:
-500 + 4x + 20x2 = 500 + -500

Combine like terms: 500 + -500 = 0
-500 + 4x + 20x2 = 0

Factor out the Greatest Common Factor (GCF), '4'.
4(-125 + x + 5x2) = 0

Ignore the factor 4.

Subproblem 1

Set the factor '(-125 + x + 5x2)' equal to zero and attempt to solve: Simplifying -125 + x + 5x2 = 0 Solving -125 + x + 5x2 = 0 Begin completing the square. Divide all terms by 5 the coefficient of the squared term: Divide each side by '5'. -25 + 0.2x + x2 = 0 Move the constant term to the right: Add '25' to each side of the equation. -25 + 0.2x + 25 + x2 = 0 + 25 Reorder the terms: -25 + 25 + 0.2x + x2 = 0 + 25 Combine like terms: -25 + 25 = 0 0 + 0.2x + x2 = 0 + 25 0.2x + x2 = 0 + 25 Combine like terms: 0 + 25 = 25 0.2x + x2 = 25 The x term is x. Take half its coefficient (0.5). Square it (0.25) and add it to both sides. Add '0.25' to each side of the equation. 0.2x + 0.25 + x2 = 25 + 0.25 Reorder the terms: 0.25 + 0.2x + x2 = 25 + 0.25 Combine like terms: 25 + 0.25 = 25.25 0.25 + 0.2x + x2 = 25.25 Factor a perfect square on the left side: (x + 0.5)(x + 0.5) = 25.25 Calculate the square root of the right side: 5.024937811 Break this problem into two subproblems by setting (x + 0.5) equal to 5.024937811 and -5.024937811.

Subproblem 1

x + 0.5 = 5.024937811 Simplifying x + 0.5 = 5.024937811 Reorder the terms: 0.5 + x = 5.024937811 Solving 0.5 + x = 5.024937811 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 5.024937811 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 5.024937811 + -0.5 x = 5.024937811 + -0.5 Combine like terms: 5.024937811 + -0.5 = 4.524937811 x = 4.524937811 Simplifying x = 4.524937811

Subproblem 2

x + 0.5 = -5.024937811 Simplifying x + 0.5 = -5.024937811 Reorder the terms: 0.5 + x = -5.024937811 Solving 0.5 + x = -5.024937811 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -5.024937811 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -5.024937811 + -0.5 x = -5.024937811 + -0.5 Combine like terms: -5.024937811 + -0.5 = -5.524937811 x = -5.524937811 Simplifying x = -5.524937811

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.524937811, -5.524937811}

Solution

x = {4.524937811, -5.524937811}

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