5x^2+2x=16-24x

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Solution for 5x^2+2x=16-24x equation:


Simplifying
5x2 + 2x = 16 + -24x

Reorder the terms:
2x + 5x2 = 16 + -24x

Solving
2x + 5x2 = 16 + -24x

Solving for variable 'x'.

Reorder the terms:
-16 + 2x + 24x + 5x2 = 16 + -24x + -16 + 24x

Combine like terms: 2x + 24x = 26x
-16 + 26x + 5x2 = 16 + -24x + -16 + 24x

Reorder the terms:
-16 + 26x + 5x2 = 16 + -16 + -24x + 24x

Combine like terms: 16 + -16 = 0
-16 + 26x + 5x2 = 0 + -24x + 24x
-16 + 26x + 5x2 = -24x + 24x

Combine like terms: -24x + 24x = 0
-16 + 26x + 5x2 = 0

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

Divide each side by '5'.
-3.2 + 5.2x + x2 = 0

Move the constant term to the right:

Add '3.2' to each side of the equation.
-3.2 + 5.2x + 3.2 + x2 = 0 + 3.2

Reorder the terms:
-3.2 + 3.2 + 5.2x + x2 = 0 + 3.2

Combine like terms: -3.2 + 3.2 = 0.0
0.0 + 5.2x + x2 = 0 + 3.2
5.2x + x2 = 0 + 3.2

Combine like terms: 0 + 3.2 = 3.2
5.2x + x2 = 3.2

The x term is 5.2x.  Take half its coefficient (2.6).
Square it (6.76) and add it to both sides.

Add '6.76' to each side of the equation.
5.2x + 6.76 + x2 = 3.2 + 6.76

Reorder the terms:
6.76 + 5.2x + x2 = 3.2 + 6.76

Combine like terms: 3.2 + 6.76 = 9.96
6.76 + 5.2x + x2 = 9.96

Factor a perfect square on the left side:
(x + 2.6)(x + 2.6) = 9.96

Calculate the square root of the right side: 3.155946768

Break this problem into two subproblems by setting 
(x + 2.6) equal to 3.155946768 and -3.155946768.

Subproblem 1

x + 2.6 = 3.155946768 Simplifying x + 2.6 = 3.155946768 Reorder the terms: 2.6 + x = 3.155946768 Solving 2.6 + x = 3.155946768 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.6' to each side of the equation. 2.6 + -2.6 + x = 3.155946768 + -2.6 Combine like terms: 2.6 + -2.6 = 0.0 0.0 + x = 3.155946768 + -2.6 x = 3.155946768 + -2.6 Combine like terms: 3.155946768 + -2.6 = 0.555946768 x = 0.555946768 Simplifying x = 0.555946768

Subproblem 2

x + 2.6 = -3.155946768 Simplifying x + 2.6 = -3.155946768 Reorder the terms: 2.6 + x = -3.155946768 Solving 2.6 + x = -3.155946768 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.6' to each side of the equation. 2.6 + -2.6 + x = -3.155946768 + -2.6 Combine like terms: 2.6 + -2.6 = 0.0 0.0 + x = -3.155946768 + -2.6 x = -3.155946768 + -2.6 Combine like terms: -3.155946768 + -2.6 = -5.755946768 x = -5.755946768 Simplifying x = -5.755946768

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.555946768, -5.755946768}

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