8800=x^2-30x+700

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Solution for 8800=x^2-30x+700 equation:


Simplifying
8800 = x2 + -30x + 700

Reorder the terms:
8800 = 700 + -30x + x2

Solving
8800 = 700 + -30x + x2

Solving for variable 'x'.

Combine like terms: 8800 + -700 = 8100
8100 + 30x + -1x2 = 700 + -30x + x2 + -700 + 30x + -1x2

Reorder the terms:
8100 + 30x + -1x2 = 700 + -700 + -30x + 30x + x2 + -1x2

Combine like terms: 700 + -700 = 0
8100 + 30x + -1x2 = 0 + -30x + 30x + x2 + -1x2
8100 + 30x + -1x2 = -30x + 30x + x2 + -1x2

Combine like terms: -30x + 30x = 0
8100 + 30x + -1x2 = 0 + x2 + -1x2
8100 + 30x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
8100 + 30x + -1x2 = 0

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

Divide each side by '-1'.
-8100 + -30x + x2 = 0

Move the constant term to the right:

Add '8100' to each side of the equation.
-8100 + -30x + 8100 + x2 = 0 + 8100

Reorder the terms:
-8100 + 8100 + -30x + x2 = 0 + 8100

Combine like terms: -8100 + 8100 = 0
0 + -30x + x2 = 0 + 8100
-30x + x2 = 0 + 8100

Combine like terms: 0 + 8100 = 8100
-30x + x2 = 8100

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 = 8100 + 225

Reorder the terms:
225 + -30x + x2 = 8100 + 225

Combine like terms: 8100 + 225 = 8325
225 + -30x + x2 = 8325

Factor a perfect square on the left side:
(x + -15)(x + -15) = 8325

Calculate the square root of the right side: 91.241437954

Break this problem into two subproblems by setting 
(x + -15) equal to 91.241437954 and -91.241437954.

Subproblem 1

x + -15 = 91.241437954 Simplifying x + -15 = 91.241437954 Reorder the terms: -15 + x = 91.241437954 Solving -15 + x = 91.241437954 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 = 91.241437954 + 15 Combine like terms: -15 + 15 = 0 0 + x = 91.241437954 + 15 x = 91.241437954 + 15 Combine like terms: 91.241437954 + 15 = 106.241437954 x = 106.241437954 Simplifying x = 106.241437954

Subproblem 2

x + -15 = -91.241437954 Simplifying x + -15 = -91.241437954 Reorder the terms: -15 + x = -91.241437954 Solving -15 + x = -91.241437954 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 = -91.241437954 + 15 Combine like terms: -15 + 15 = 0 0 + x = -91.241437954 + 15 x = -91.241437954 + 15 Combine like terms: -91.241437954 + 15 = -76.241437954 x = -76.241437954 Simplifying x = -76.241437954

Solution

The solution to the problem is based on the solutions from the subproblems. x = {106.241437954, -76.241437954}

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