x^2+20x+27=10

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Solution for x^2+20x+27=10 equation:


Simplifying
x2 + 20x + 27 = 10

Reorder the terms:
27 + 20x + x2 = 10

Solving
27 + 20x + x2 = 10

Solving for variable 'x'.

Reorder the terms:
27 + -10 + 20x + x2 = 10 + -10

Combine like terms: 27 + -10 = 17
17 + 20x + x2 = 10 + -10

Combine like terms: 10 + -10 = 0
17 + 20x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-17' to each side of the equation.
17 + 20x + -17 + x2 = 0 + -17

Reorder the terms:
17 + -17 + 20x + x2 = 0 + -17

Combine like terms: 17 + -17 = 0
0 + 20x + x2 = 0 + -17
20x + x2 = 0 + -17

Combine like terms: 0 + -17 = -17
20x + x2 = -17

The x term is 20x.  Take half its coefficient (10).
Square it (100) and add it to both sides.

Add '100' to each side of the equation.
20x + 100 + x2 = -17 + 100

Reorder the terms:
100 + 20x + x2 = -17 + 100

Combine like terms: -17 + 100 = 83
100 + 20x + x2 = 83

Factor a perfect square on the left side:
(x + 10)(x + 10) = 83

Calculate the square root of the right side: 9.110433579

Break this problem into two subproblems by setting 
(x + 10) equal to 9.110433579 and -9.110433579.

Subproblem 1

x + 10 = 9.110433579 Simplifying x + 10 = 9.110433579 Reorder the terms: 10 + x = 9.110433579 Solving 10 + x = 9.110433579 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + x = 9.110433579 + -10 Combine like terms: 10 + -10 = 0 0 + x = 9.110433579 + -10 x = 9.110433579 + -10 Combine like terms: 9.110433579 + -10 = -0.889566421 x = -0.889566421 Simplifying x = -0.889566421

Subproblem 2

x + 10 = -9.110433579 Simplifying x + 10 = -9.110433579 Reorder the terms: 10 + x = -9.110433579 Solving 10 + x = -9.110433579 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + x = -9.110433579 + -10 Combine like terms: 10 + -10 = 0 0 + x = -9.110433579 + -10 x = -9.110433579 + -10 Combine like terms: -9.110433579 + -10 = -19.110433579 x = -19.110433579 Simplifying x = -19.110433579

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.889566421, -19.110433579}

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