5x+5x^2=200

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Solution for 5x+5x^2=200 equation:


Simplifying
5x + 5x2 = 200

Solving
5x + 5x2 = 200

Solving for variable 'x'.

Reorder the terms:
-200 + 5x + 5x2 = 200 + -200

Combine like terms: 200 + -200 = 0
-200 + 5x + 5x2 = 0

Factor out the Greatest Common Factor (GCF), '5'.
5(-40 + x + x2) = 0

Ignore the factor 5.

Subproblem 1

Set the factor '(-40 + x + x2)' equal to zero and attempt to solve: Simplifying -40 + x + x2 = 0 Solving -40 + x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '40' to each side of the equation. -40 + x + 40 + x2 = 0 + 40 Reorder the terms: -40 + 40 + x + x2 = 0 + 40 Combine like terms: -40 + 40 = 0 0 + x + x2 = 0 + 40 x + x2 = 0 + 40 Combine like terms: 0 + 40 = 40 x + x2 = 40 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. x + 0.25 + x2 = 40 + 0.25 Reorder the terms: 0.25 + x + x2 = 40 + 0.25 Combine like terms: 40 + 0.25 = 40.25 0.25 + x + x2 = 40.25 Factor a perfect square on the left side: (x + 0.5)(x + 0.5) = 40.25 Calculate the square root of the right side: 6.34428877 Break this problem into two subproblems by setting (x + 0.5) equal to 6.34428877 and -6.34428877.

Subproblem 1

x + 0.5 = 6.34428877 Simplifying x + 0.5 = 6.34428877 Reorder the terms: 0.5 + x = 6.34428877 Solving 0.5 + x = 6.34428877 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 = 6.34428877 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 6.34428877 + -0.5 x = 6.34428877 + -0.5 Combine like terms: 6.34428877 + -0.5 = 5.84428877 x = 5.84428877 Simplifying x = 5.84428877

Subproblem 2

x + 0.5 = -6.34428877 Simplifying x + 0.5 = -6.34428877 Reorder the terms: 0.5 + x = -6.34428877 Solving 0.5 + x = -6.34428877 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 = -6.34428877 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -6.34428877 + -0.5 x = -6.34428877 + -0.5 Combine like terms: -6.34428877 + -0.5 = -6.84428877 x = -6.84428877 Simplifying x = -6.84428877

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.84428877, -6.84428877}

Solution

x = {5.84428877, -6.84428877}

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