48x^2+72x-5=0

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Solution for 48x^2+72x-5=0 equation:


Simplifying
48x2 + 72x + -5 = 0

Reorder the terms:
-5 + 72x + 48x2 = 0

Solving
-5 + 72x + 48x2 = 0

Solving for variable 'x'.

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

Divide each side by '48'.
-0.1041666667 + 1.5x + x2 = 0

Move the constant term to the right:

Add '0.1041666667' to each side of the equation.
-0.1041666667 + 1.5x + 0.1041666667 + x2 = 0 + 0.1041666667

Reorder the terms:
-0.1041666667 + 0.1041666667 + 1.5x + x2 = 0 + 0.1041666667

Combine like terms: -0.1041666667 + 0.1041666667 = 0.0000000000
0.0000000000 + 1.5x + x2 = 0 + 0.1041666667
1.5x + x2 = 0 + 0.1041666667

Combine like terms: 0 + 0.1041666667 = 0.1041666667
1.5x + x2 = 0.1041666667

The x term is 1.5x.  Take half its coefficient (0.75).
Square it (0.5625) and add it to both sides.

Add '0.5625' to each side of the equation.
1.5x + 0.5625 + x2 = 0.1041666667 + 0.5625

Reorder the terms:
0.5625 + 1.5x + x2 = 0.1041666667 + 0.5625

Combine like terms: 0.1041666667 + 0.5625 = 0.6666666667
0.5625 + 1.5x + x2 = 0.6666666667

Factor a perfect square on the left side:
(x + 0.75)(x + 0.75) = 0.6666666667

Calculate the square root of the right side: 0.816496581

Break this problem into two subproblems by setting 
(x + 0.75) equal to 0.816496581 and -0.816496581.

Subproblem 1

x + 0.75 = 0.816496581 Simplifying x + 0.75 = 0.816496581 Reorder the terms: 0.75 + x = 0.816496581 Solving 0.75 + x = 0.816496581 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.75' to each side of the equation. 0.75 + -0.75 + x = 0.816496581 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + x = 0.816496581 + -0.75 x = 0.816496581 + -0.75 Combine like terms: 0.816496581 + -0.75 = 0.066496581 x = 0.066496581 Simplifying x = 0.066496581

Subproblem 2

x + 0.75 = -0.816496581 Simplifying x + 0.75 = -0.816496581 Reorder the terms: 0.75 + x = -0.816496581 Solving 0.75 + x = -0.816496581 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.75' to each side of the equation. 0.75 + -0.75 + x = -0.816496581 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + x = -0.816496581 + -0.75 x = -0.816496581 + -0.75 Combine like terms: -0.816496581 + -0.75 = -1.566496581 x = -1.566496581 Simplifying x = -1.566496581

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.066496581, -1.566496581}

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