2x^2+2x=200

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


Simplifying
2x2 + 2x = 200

Reorder the terms:
2x + 2x2 = 200

Solving
2x + 2x2 = 200

Solving for variable 'x'.

Reorder the terms:
-200 + 2x + 2x2 = 200 + -200

Combine like terms: 200 + -200 = 0
-200 + 2x + 2x2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(-100 + x + x2) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(-100 + x + x2)' equal to zero and attempt to solve: Simplifying -100 + x + x2 = 0 Solving -100 + x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '100' to each side of the equation. -100 + x + 100 + x2 = 0 + 100 Reorder the terms: -100 + 100 + x + x2 = 0 + 100 Combine like terms: -100 + 100 = 0 0 + x + x2 = 0 + 100 x + x2 = 0 + 100 Combine like terms: 0 + 100 = 100 x + x2 = 100 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 = 100 + 0.25 Reorder the terms: 0.25 + x + x2 = 100 + 0.25 Combine like terms: 100 + 0.25 = 100.25 0.25 + x + x2 = 100.25 Factor a perfect square on the left side: (x + 0.5)(x + 0.5) = 100.25 Calculate the square root of the right side: 10.012492197 Break this problem into two subproblems by setting (x + 0.5) equal to 10.012492197 and -10.012492197.

Subproblem 1

x + 0.5 = 10.012492197 Simplifying x + 0.5 = 10.012492197 Reorder the terms: 0.5 + x = 10.012492197 Solving 0.5 + x = 10.012492197 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 = 10.012492197 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 10.012492197 + -0.5 x = 10.012492197 + -0.5 Combine like terms: 10.012492197 + -0.5 = 9.512492197 x = 9.512492197 Simplifying x = 9.512492197

Subproblem 2

x + 0.5 = -10.012492197 Simplifying x + 0.5 = -10.012492197 Reorder the terms: 0.5 + x = -10.012492197 Solving 0.5 + x = -10.012492197 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 = -10.012492197 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -10.012492197 + -0.5 x = -10.012492197 + -0.5 Combine like terms: -10.012492197 + -0.5 = -10.512492197 x = -10.512492197 Simplifying x = -10.512492197

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.512492197, -10.512492197}

Solution

x = {9.512492197, -10.512492197}

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