2x^2+12x+20=64

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Solution for 2x^2+12x+20=64 equation:


Simplifying
2x2 + 12x + 20 = 64

Reorder the terms:
20 + 12x + 2x2 = 64

Solving
20 + 12x + 2x2 = 64

Solving for variable 'x'.

Reorder the terms:
20 + -64 + 12x + 2x2 = 64 + -64

Combine like terms: 20 + -64 = -44
-44 + 12x + 2x2 = 64 + -64

Combine like terms: 64 + -64 = 0
-44 + 12x + 2x2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(-22 + 6x + x2) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(-22 + 6x + x2)' equal to zero and attempt to solve: Simplifying -22 + 6x + x2 = 0 Solving -22 + 6x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '22' to each side of the equation. -22 + 6x + 22 + x2 = 0 + 22 Reorder the terms: -22 + 22 + 6x + x2 = 0 + 22 Combine like terms: -22 + 22 = 0 0 + 6x + x2 = 0 + 22 6x + x2 = 0 + 22 Combine like terms: 0 + 22 = 22 6x + x2 = 22 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 = 22 + 9 Reorder the terms: 9 + 6x + x2 = 22 + 9 Combine like terms: 22 + 9 = 31 9 + 6x + x2 = 31 Factor a perfect square on the left side: (x + 3)(x + 3) = 31 Calculate the square root of the right side: 5.567764363 Break this problem into two subproblems by setting (x + 3) equal to 5.567764363 and -5.567764363.

Subproblem 1

x + 3 = 5.567764363 Simplifying x + 3 = 5.567764363 Reorder the terms: 3 + x = 5.567764363 Solving 3 + x = 5.567764363 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 = 5.567764363 + -3 Combine like terms: 3 + -3 = 0 0 + x = 5.567764363 + -3 x = 5.567764363 + -3 Combine like terms: 5.567764363 + -3 = 2.567764363 x = 2.567764363 Simplifying x = 2.567764363

Subproblem 2

x + 3 = -5.567764363 Simplifying x + 3 = -5.567764363 Reorder the terms: 3 + x = -5.567764363 Solving 3 + x = -5.567764363 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 = -5.567764363 + -3 Combine like terms: 3 + -3 = 0 0 + x = -5.567764363 + -3 x = -5.567764363 + -3 Combine like terms: -5.567764363 + -3 = -8.567764363 x = -8.567764363 Simplifying x = -8.567764363

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.567764363, -8.567764363}

Solution

x = {2.567764363, -8.567764363}

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