8800=x^2+30x-7000

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Solution for 8800=x^2+30x-7000 equation:


Simplifying
8800 = x2 + 30x + -7000

Reorder the terms:
8800 = -7000 + 30x + x2

Solving
8800 = -7000 + 30x + x2

Solving for variable 'x'.

Combine like terms: 8800 + 7000 = 15800
15800 + -30x + -1x2 = -7000 + 30x + x2 + 7000 + -30x + -1x2

Reorder the terms:
15800 + -30x + -1x2 = -7000 + 7000 + 30x + -30x + x2 + -1x2

Combine like terms: -7000 + 7000 = 0
15800 + -30x + -1x2 = 0 + 30x + -30x + x2 + -1x2
15800 + -30x + -1x2 = 30x + -30x + x2 + -1x2

Combine like terms: 30x + -30x = 0
15800 + -30x + -1x2 = 0 + x2 + -1x2
15800 + -30x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
15800 + -30x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-15800 + 30x + x2 = 0

Move the constant term to the right:

Add '15800' to each side of the equation.
-15800 + 30x + 15800 + x2 = 0 + 15800

Reorder the terms:
-15800 + 15800 + 30x + x2 = 0 + 15800

Combine like terms: -15800 + 15800 = 0
0 + 30x + x2 = 0 + 15800
30x + x2 = 0 + 15800

Combine like terms: 0 + 15800 = 15800
30x + x2 = 15800

The x term is 30x.  Take half its coefficient (15).
Square it (225) and add it to both sides.

Add '225' to each side of the equation.
30x + 225 + x2 = 15800 + 225

Reorder the terms:
225 + 30x + x2 = 15800 + 225

Combine like terms: 15800 + 225 = 16025
225 + 30x + x2 = 16025

Factor a perfect square on the left side:
(x + 15)(x + 15) = 16025

Calculate the square root of the right side: 126.589889012

Break this problem into two subproblems by setting 
(x + 15) equal to 126.589889012 and -126.589889012.

Subproblem 1

x + 15 = 126.589889012 Simplifying x + 15 = 126.589889012 Reorder the terms: 15 + x = 126.589889012 Solving 15 + x = 126.589889012 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-15' to each side of the equation. 15 + -15 + x = 126.589889012 + -15 Combine like terms: 15 + -15 = 0 0 + x = 126.589889012 + -15 x = 126.589889012 + -15 Combine like terms: 126.589889012 + -15 = 111.589889012 x = 111.589889012 Simplifying x = 111.589889012

Subproblem 2

x + 15 = -126.589889012 Simplifying x + 15 = -126.589889012 Reorder the terms: 15 + x = -126.589889012 Solving 15 + x = -126.589889012 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-15' to each side of the equation. 15 + -15 + x = -126.589889012 + -15 Combine like terms: 15 + -15 = 0 0 + x = -126.589889012 + -15 x = -126.589889012 + -15 Combine like terms: -126.589889012 + -15 = -141.589889012 x = -141.589889012 Simplifying x = -141.589889012

Solution

The solution to the problem is based on the solutions from the subproblems. x = {111.589889012, -141.589889012}

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