(x+14)(x+4)=900

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Solution for (x+14)(x+4)=900 equation:


Simplifying
(x + 14)(x + 4) = 900

Reorder the terms:
(14 + x)(x + 4) = 900

Reorder the terms:
(14 + x)(4 + x) = 900

Multiply (14 + x) * (4 + x)
(14(4 + x) + x(4 + x)) = 900
((4 * 14 + x * 14) + x(4 + x)) = 900
((56 + 14x) + x(4 + x)) = 900
(56 + 14x + (4 * x + x * x)) = 900
(56 + 14x + (4x + x2)) = 900

Combine like terms: 14x + 4x = 18x
(56 + 18x + x2) = 900

Solving
56 + 18x + x2 = 900

Solving for variable 'x'.

Reorder the terms:
56 + -900 + 18x + x2 = 900 + -900

Combine like terms: 56 + -900 = -844
-844 + 18x + x2 = 900 + -900

Combine like terms: 900 + -900 = 0
-844 + 18x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '844' to each side of the equation.
-844 + 18x + 844 + x2 = 0 + 844

Reorder the terms:
-844 + 844 + 18x + x2 = 0 + 844

Combine like terms: -844 + 844 = 0
0 + 18x + x2 = 0 + 844
18x + x2 = 0 + 844

Combine like terms: 0 + 844 = 844
18x + x2 = 844

The x term is 18x.  Take half its coefficient (9).
Square it (81) and add it to both sides.

Add '81' to each side of the equation.
18x + 81 + x2 = 844 + 81

Reorder the terms:
81 + 18x + x2 = 844 + 81

Combine like terms: 844 + 81 = 925
81 + 18x + x2 = 925

Factor a perfect square on the left side:
(x + 9)(x + 9) = 925

Calculate the square root of the right side: 30.413812651

Break this problem into two subproblems by setting 
(x + 9) equal to 30.413812651 and -30.413812651.

Subproblem 1

x + 9 = 30.413812651 Simplifying x + 9 = 30.413812651 Reorder the terms: 9 + x = 30.413812651 Solving 9 + x = 30.413812651 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + x = 30.413812651 + -9 Combine like terms: 9 + -9 = 0 0 + x = 30.413812651 + -9 x = 30.413812651 + -9 Combine like terms: 30.413812651 + -9 = 21.413812651 x = 21.413812651 Simplifying x = 21.413812651

Subproblem 2

x + 9 = -30.413812651 Simplifying x + 9 = -30.413812651 Reorder the terms: 9 + x = -30.413812651 Solving 9 + x = -30.413812651 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + x = -30.413812651 + -9 Combine like terms: 9 + -9 = 0 0 + x = -30.413812651 + -9 x = -30.413812651 + -9 Combine like terms: -30.413812651 + -9 = -39.413812651 x = -39.413812651 Simplifying x = -39.413812651

Solution

The solution to the problem is based on the solutions from the subproblems. x = {21.413812651, -39.413812651}

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