(x+6)(x+14)=57

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Solution for (x+6)(x+14)=57 equation:


Simplifying
(x + 6)(x + 14) = 57

Reorder the terms:
(6 + x)(x + 14) = 57

Reorder the terms:
(6 + x)(14 + x) = 57

Multiply (6 + x) * (14 + x)
(6(14 + x) + x(14 + x)) = 57
((14 * 6 + x * 6) + x(14 + x)) = 57
((84 + 6x) + x(14 + x)) = 57
(84 + 6x + (14 * x + x * x)) = 57
(84 + 6x + (14x + x2)) = 57

Combine like terms: 6x + 14x = 20x
(84 + 20x + x2) = 57

Solving
84 + 20x + x2 = 57

Solving for variable 'x'.

Reorder the terms:
84 + -57 + 20x + x2 = 57 + -57

Combine like terms: 84 + -57 = 27
27 + 20x + x2 = 57 + -57

Combine like terms: 57 + -57 = 0
27 + 20x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-27' to each side of the equation.
27 + 20x + -27 + x2 = 0 + -27

Reorder the terms:
27 + -27 + 20x + x2 = 0 + -27

Combine like terms: 27 + -27 = 0
0 + 20x + x2 = 0 + -27
20x + x2 = 0 + -27

Combine like terms: 0 + -27 = -27
20x + x2 = -27

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 = -27 + 100

Reorder the terms:
100 + 20x + x2 = -27 + 100

Combine like terms: -27 + 100 = 73
100 + 20x + x2 = 73

Factor a perfect square on the left side:
(x + 10)(x + 10) = 73

Calculate the square root of the right side: 8.544003745

Break this problem into two subproblems by setting 
(x + 10) equal to 8.544003745 and -8.544003745.

Subproblem 1

x + 10 = 8.544003745 Simplifying x + 10 = 8.544003745 Reorder the terms: 10 + x = 8.544003745 Solving 10 + x = 8.544003745 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 = 8.544003745 + -10 Combine like terms: 10 + -10 = 0 0 + x = 8.544003745 + -10 x = 8.544003745 + -10 Combine like terms: 8.544003745 + -10 = -1.455996255 x = -1.455996255 Simplifying x = -1.455996255

Subproblem 2

x + 10 = -8.544003745 Simplifying x + 10 = -8.544003745 Reorder the terms: 10 + x = -8.544003745 Solving 10 + x = -8.544003745 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 = -8.544003745 + -10 Combine like terms: 10 + -10 = 0 0 + x = -8.544003745 + -10 x = -8.544003745 + -10 Combine like terms: -8.544003745 + -10 = -18.544003745 x = -18.544003745 Simplifying x = -18.544003745

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-1.455996255, -18.544003745}

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