267.9x-3x^2=15x+3551.1

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Solution for 267.9x-3x^2=15x+3551.1 equation:


Simplifying
267.9x + -3x2 = 15x + 3551.1

Reorder the terms:
267.9x + -3x2 = 3551.1 + 15x

Solving
267.9x + -3x2 = 3551.1 + 15x

Solving for variable 'x'.

Reorder the terms:
-3551.1 + 267.9x + -15x + -3x2 = 3551.1 + 15x + -3551.1 + -15x

Combine like terms: 267.9x + -15x = 252.9x
-3551.1 + 252.9x + -3x2 = 3551.1 + 15x + -3551.1 + -15x

Reorder the terms:
-3551.1 + 252.9x + -3x2 = 3551.1 + -3551.1 + 15x + -15x

Combine like terms: 3551.1 + -3551.1 = 0.0
-3551.1 + 252.9x + -3x2 = 0.0 + 15x + -15x
-3551.1 + 252.9x + -3x2 = 15x + -15x

Combine like terms: 15x + -15x = 0
-3551.1 + 252.9x + -3x2 = 0

Begin completing the square.  Divide all terms by
-3 the coefficient of the squared term: 

Divide each side by '-3'.
1183.7 + -84.3x + x2 = 0

Move the constant term to the right:

Add '-1183.7' to each side of the equation.
1183.7 + -84.3x + -1183.7 + x2 = 0 + -1183.7

Reorder the terms:
1183.7 + -1183.7 + -84.3x + x2 = 0 + -1183.7

Combine like terms: 1183.7 + -1183.7 = 0.0
0.0 + -84.3x + x2 = 0 + -1183.7
-84.3x + x2 = 0 + -1183.7

Combine like terms: 0 + -1183.7 = -1183.7
-84.3x + x2 = -1183.7

The x term is -84.3x.  Take half its coefficient (-42.15).
Square it (1776.6225) and add it to both sides.

Add '1776.6225' to each side of the equation.
-84.3x + 1776.6225 + x2 = -1183.7 + 1776.6225

Reorder the terms:
1776.6225 + -84.3x + x2 = -1183.7 + 1776.6225

Combine like terms: -1183.7 + 1776.6225 = 592.9225
1776.6225 + -84.3x + x2 = 592.9225

Factor a perfect square on the left side:
(x + -42.15)(x + -42.15) = 592.9225

Calculate the square root of the right side: 24.35

Break this problem into two subproblems by setting 
(x + -42.15) equal to 24.35 and -24.35.

Subproblem 1

x + -42.15 = 24.35 Simplifying x + -42.15 = 24.35 Reorder the terms: -42.15 + x = 24.35 Solving -42.15 + x = 24.35 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '42.15' to each side of the equation. -42.15 + 42.15 + x = 24.35 + 42.15 Combine like terms: -42.15 + 42.15 = 0.00 0.00 + x = 24.35 + 42.15 x = 24.35 + 42.15 Combine like terms: 24.35 + 42.15 = 66.5 x = 66.5 Simplifying x = 66.5

Subproblem 2

x + -42.15 = -24.35 Simplifying x + -42.15 = -24.35 Reorder the terms: -42.15 + x = -24.35 Solving -42.15 + x = -24.35 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '42.15' to each side of the equation. -42.15 + 42.15 + x = -24.35 + 42.15 Combine like terms: -42.15 + 42.15 = 0.00 0.00 + x = -24.35 + 42.15 x = -24.35 + 42.15 Combine like terms: -24.35 + 42.15 = 17.8 x = 17.8 Simplifying x = 17.8

Solution

The solution to the problem is based on the solutions from the subproblems. x = {66.5, 17.8}

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