2x^2+12x=36

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Solution for 2x^2+12x=36 equation:


Simplifying
2x2 + 12x = 36

Reorder the terms:
12x + 2x2 = 36

Solving
12x + 2x2 = 36

Solving for variable 'x'.

Reorder the terms:
-36 + 12x + 2x2 = 36 + -36

Combine like terms: 36 + -36 = 0
-36 + 12x + 2x2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(-18 + 6x + x2) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(-18 + 6x + x2)' equal to zero and attempt to solve: Simplifying -18 + 6x + x2 = 0 Solving -18 + 6x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '18' to each side of the equation. -18 + 6x + 18 + x2 = 0 + 18 Reorder the terms: -18 + 18 + 6x + x2 = 0 + 18 Combine like terms: -18 + 18 = 0 0 + 6x + x2 = 0 + 18 6x + x2 = 0 + 18 Combine like terms: 0 + 18 = 18 6x + x2 = 18 The x term is 6x. Take half its coefficient (3). Square it (9) and add it to both sides. Add '9' to each side of the equation. 6x + 9 + x2 = 18 + 9 Reorder the terms: 9 + 6x + x2 = 18 + 9 Combine like terms: 18 + 9 = 27 9 + 6x + x2 = 27 Factor a perfect square on the left side: (x + 3)(x + 3) = 27 Calculate the square root of the right side: 5.196152423 Break this problem into two subproblems by setting (x + 3) equal to 5.196152423 and -5.196152423.

Subproblem 1

x + 3 = 5.196152423 Simplifying x + 3 = 5.196152423 Reorder the terms: 3 + x = 5.196152423 Solving 3 + x = 5.196152423 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = 5.196152423 + -3 Combine like terms: 3 + -3 = 0 0 + x = 5.196152423 + -3 x = 5.196152423 + -3 Combine like terms: 5.196152423 + -3 = 2.196152423 x = 2.196152423 Simplifying x = 2.196152423

Subproblem 2

x + 3 = -5.196152423 Simplifying x + 3 = -5.196152423 Reorder the terms: 3 + x = -5.196152423 Solving 3 + x = -5.196152423 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = -5.196152423 + -3 Combine like terms: 3 + -3 = 0 0 + x = -5.196152423 + -3 x = -5.196152423 + -3 Combine like terms: -5.196152423 + -3 = -8.196152423 x = -8.196152423 Simplifying x = -8.196152423

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.196152423, -8.196152423}

Solution

x = {2.196152423, -8.196152423}

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