20x^2-204x=216

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Solution for 20x^2-204x=216 equation:


Simplifying
20x2 + -204x = 216

Reorder the terms:
-204x + 20x2 = 216

Solving
-204x + 20x2 = 216

Solving for variable 'x'.

Reorder the terms:
-216 + -204x + 20x2 = 216 + -216

Combine like terms: 216 + -216 = 0
-216 + -204x + 20x2 = 0

Factor out the Greatest Common Factor (GCF), '4'.
4(-54 + -51x + 5x2) = 0

Ignore the factor 4.

Subproblem 1

Set the factor '(-54 + -51x + 5x2)' equal to zero and attempt to solve: Simplifying -54 + -51x + 5x2 = 0 Solving -54 + -51x + 5x2 = 0 Begin completing the square. Divide all terms by 5 the coefficient of the squared term: Divide each side by '5'. -10.8 + -10.2x + x2 = 0 Move the constant term to the right: Add '10.8' to each side of the equation. -10.8 + -10.2x + 10.8 + x2 = 0 + 10.8 Reorder the terms: -10.8 + 10.8 + -10.2x + x2 = 0 + 10.8 Combine like terms: -10.8 + 10.8 = 0.0 0.0 + -10.2x + x2 = 0 + 10.8 -10.2x + x2 = 0 + 10.8 Combine like terms: 0 + 10.8 = 10.8 -10.2x + x2 = 10.8 The x term is -10.2x. Take half its coefficient (-5.1). Square it (26.01) and add it to both sides. Add '26.01' to each side of the equation. -10.2x + 26.01 + x2 = 10.8 + 26.01 Reorder the terms: 26.01 + -10.2x + x2 = 10.8 + 26.01 Combine like terms: 10.8 + 26.01 = 36.81 26.01 + -10.2x + x2 = 36.81 Factor a perfect square on the left side: (x + -5.1)(x + -5.1) = 36.81 Calculate the square root of the right side: 6.067124525 Break this problem into two subproblems by setting (x + -5.1) equal to 6.067124525 and -6.067124525.

Subproblem 1

x + -5.1 = 6.067124525 Simplifying x + -5.1 = 6.067124525 Reorder the terms: -5.1 + x = 6.067124525 Solving -5.1 + x = 6.067124525 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5.1' to each side of the equation. -5.1 + 5.1 + x = 6.067124525 + 5.1 Combine like terms: -5.1 + 5.1 = 0.0 0.0 + x = 6.067124525 + 5.1 x = 6.067124525 + 5.1 Combine like terms: 6.067124525 + 5.1 = 11.167124525 x = 11.167124525 Simplifying x = 11.167124525

Subproblem 2

x + -5.1 = -6.067124525 Simplifying x + -5.1 = -6.067124525 Reorder the terms: -5.1 + x = -6.067124525 Solving -5.1 + x = -6.067124525 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5.1' to each side of the equation. -5.1 + 5.1 + x = -6.067124525 + 5.1 Combine like terms: -5.1 + 5.1 = 0.0 0.0 + x = -6.067124525 + 5.1 x = -6.067124525 + 5.1 Combine like terms: -6.067124525 + 5.1 = -0.967124525 x = -0.967124525 Simplifying x = -0.967124525

Solution

The solution to the problem is based on the solutions from the subproblems. x = {11.167124525, -0.967124525}

Solution

x = {11.167124525, -0.967124525}

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