0=-2x^2-13x+48

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Solution for 0=-2x^2-13x+48 equation:


Simplifying
0 = -2x2 + -13x + 48

Reorder the terms:
0 = 48 + -13x + -2x2

Solving
0 = 48 + -13x + -2x2

Solving for variable 'x'.

Combine like terms: 0 + -48 = -48
-48 + 13x + 2x2 = 48 + -13x + -2x2 + -48 + 13x + 2x2

Reorder the terms:
-48 + 13x + 2x2 = 48 + -48 + -13x + 13x + -2x2 + 2x2

Combine like terms: 48 + -48 = 0
-48 + 13x + 2x2 = 0 + -13x + 13x + -2x2 + 2x2
-48 + 13x + 2x2 = -13x + 13x + -2x2 + 2x2

Combine like terms: -13x + 13x = 0
-48 + 13x + 2x2 = 0 + -2x2 + 2x2
-48 + 13x + 2x2 = -2x2 + 2x2

Combine like terms: -2x2 + 2x2 = 0
-48 + 13x + 2x2 = 0

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

Divide each side by '2'.
-24 + 6.5x + x2 = 0

Move the constant term to the right:

Add '24' to each side of the equation.
-24 + 6.5x + 24 + x2 = 0 + 24

Reorder the terms:
-24 + 24 + 6.5x + x2 = 0 + 24

Combine like terms: -24 + 24 = 0
0 + 6.5x + x2 = 0 + 24
6.5x + x2 = 0 + 24

Combine like terms: 0 + 24 = 24
6.5x + x2 = 24

The x term is 6.5x.  Take half its coefficient (3.25).
Square it (10.5625) and add it to both sides.

Add '10.5625' to each side of the equation.
6.5x + 10.5625 + x2 = 24 + 10.5625

Reorder the terms:
10.5625 + 6.5x + x2 = 24 + 10.5625

Combine like terms: 24 + 10.5625 = 34.5625
10.5625 + 6.5x + x2 = 34.5625

Factor a perfect square on the left side:
(x + 3.25)(x + 3.25) = 34.5625

Calculate the square root of the right side: 5.878988008

Break this problem into two subproblems by setting 
(x + 3.25) equal to 5.878988008 and -5.878988008.

Subproblem 1

x + 3.25 = 5.878988008 Simplifying x + 3.25 = 5.878988008 Reorder the terms: 3.25 + x = 5.878988008 Solving 3.25 + x = 5.878988008 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.25' to each side of the equation. 3.25 + -3.25 + x = 5.878988008 + -3.25 Combine like terms: 3.25 + -3.25 = 0.00 0.00 + x = 5.878988008 + -3.25 x = 5.878988008 + -3.25 Combine like terms: 5.878988008 + -3.25 = 2.628988008 x = 2.628988008 Simplifying x = 2.628988008

Subproblem 2

x + 3.25 = -5.878988008 Simplifying x + 3.25 = -5.878988008 Reorder the terms: 3.25 + x = -5.878988008 Solving 3.25 + x = -5.878988008 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.25' to each side of the equation. 3.25 + -3.25 + x = -5.878988008 + -3.25 Combine like terms: 3.25 + -3.25 = 0.00 0.00 + x = -5.878988008 + -3.25 x = -5.878988008 + -3.25 Combine like terms: -5.878988008 + -3.25 = -9.128988008 x = -9.128988008 Simplifying x = -9.128988008

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.628988008, -9.128988008}

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