x^2+24x=-3x^2+11

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Solution for x^2+24x=-3x^2+11 equation:


Simplifying
x2 + 24x = -3x2 + 11

Reorder the terms:
24x + x2 = -3x2 + 11

Reorder the terms:
24x + x2 = 11 + -3x2

Solving
24x + x2 = 11 + -3x2

Solving for variable 'x'.

Reorder the terms:
-11 + 24x + x2 + 3x2 = 11 + -3x2 + -11 + 3x2

Combine like terms: x2 + 3x2 = 4x2
-11 + 24x + 4x2 = 11 + -3x2 + -11 + 3x2

Reorder the terms:
-11 + 24x + 4x2 = 11 + -11 + -3x2 + 3x2

Combine like terms: 11 + -11 = 0
-11 + 24x + 4x2 = 0 + -3x2 + 3x2
-11 + 24x + 4x2 = -3x2 + 3x2

Combine like terms: -3x2 + 3x2 = 0
-11 + 24x + 4x2 = 0

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

Divide each side by '4'.
-2.75 + 6x + x2 = 0

Move the constant term to the right:

Add '2.75' to each side of the equation.
-2.75 + 6x + 2.75 + x2 = 0 + 2.75

Reorder the terms:
-2.75 + 2.75 + 6x + x2 = 0 + 2.75

Combine like terms: -2.75 + 2.75 = 0.00
0.00 + 6x + x2 = 0 + 2.75
6x + x2 = 0 + 2.75

Combine like terms: 0 + 2.75 = 2.75
6x + x2 = 2.75

The x term is 6x.  Take half its coefficient (3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
6x + 9 + x2 = 2.75 + 9

Reorder the terms:
9 + 6x + x2 = 2.75 + 9

Combine like terms: 2.75 + 9 = 11.75
9 + 6x + x2 = 11.75

Factor a perfect square on the left side:
(x + 3)(x + 3) = 11.75

Calculate the square root of the right side: 3.4278273

Break this problem into two subproblems by setting 
(x + 3) equal to 3.4278273 and -3.4278273.

Subproblem 1

x + 3 = 3.4278273 Simplifying x + 3 = 3.4278273 Reorder the terms: 3 + x = 3.4278273 Solving 3 + x = 3.4278273 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = 3.4278273 + -3 Combine like terms: 3 + -3 = 0 0 + x = 3.4278273 + -3 x = 3.4278273 + -3 Combine like terms: 3.4278273 + -3 = 0.4278273 x = 0.4278273 Simplifying x = 0.4278273

Subproblem 2

x + 3 = -3.4278273 Simplifying x + 3 = -3.4278273 Reorder the terms: 3 + x = -3.4278273 Solving 3 + x = -3.4278273 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = -3.4278273 + -3 Combine like terms: 3 + -3 = 0 0 + x = -3.4278273 + -3 x = -3.4278273 + -3 Combine like terms: -3.4278273 + -3 = -6.4278273 x = -6.4278273 Simplifying x = -6.4278273

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.4278273, -6.4278273}

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