(x+14)(x)=300

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Solution for (x+14)(x)=300 equation:


Simplifying
(x + 14)(x) = 300

Reorder the terms:
(14 + x)(x) = 300

Reorder the terms for easier multiplication:
x(14 + x) = 300
(14 * x + x * x) = 300
(14x + x2) = 300

Solving
14x + x2 = 300

Solving for variable 'x'.

Reorder the terms:
-300 + 14x + x2 = 300 + -300

Combine like terms: 300 + -300 = 0
-300 + 14x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '300' to each side of the equation.
-300 + 14x + 300 + x2 = 0 + 300

Reorder the terms:
-300 + 300 + 14x + x2 = 0 + 300

Combine like terms: -300 + 300 = 0
0 + 14x + x2 = 0 + 300
14x + x2 = 0 + 300

Combine like terms: 0 + 300 = 300
14x + x2 = 300

The x term is 14x.  Take half its coefficient (7).
Square it (49) and add it to both sides.

Add '49' to each side of the equation.
14x + 49 + x2 = 300 + 49

Reorder the terms:
49 + 14x + x2 = 300 + 49

Combine like terms: 300 + 49 = 349
49 + 14x + x2 = 349

Factor a perfect square on the left side:
(x + 7)(x + 7) = 349

Calculate the square root of the right side: 18.681541692

Break this problem into two subproblems by setting 
(x + 7) equal to 18.681541692 and -18.681541692.

Subproblem 1

x + 7 = 18.681541692 Simplifying x + 7 = 18.681541692 Reorder the terms: 7 + x = 18.681541692 Solving 7 + x = 18.681541692 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + x = 18.681541692 + -7 Combine like terms: 7 + -7 = 0 0 + x = 18.681541692 + -7 x = 18.681541692 + -7 Combine like terms: 18.681541692 + -7 = 11.681541692 x = 11.681541692 Simplifying x = 11.681541692

Subproblem 2

x + 7 = -18.681541692 Simplifying x + 7 = -18.681541692 Reorder the terms: 7 + x = -18.681541692 Solving 7 + x = -18.681541692 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + x = -18.681541692 + -7 Combine like terms: 7 + -7 = 0 0 + x = -18.681541692 + -7 x = -18.681541692 + -7 Combine like terms: -18.681541692 + -7 = -25.681541692 x = -25.681541692 Simplifying x = -25.681541692

Solution

The solution to the problem is based on the solutions from the subproblems. x = {11.681541692, -25.681541692}

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