15x^2+48x+8=0

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Solution for 15x^2+48x+8=0 equation:


Simplifying
15x2 + 48x + 8 = 0

Reorder the terms:
8 + 48x + 15x2 = 0

Solving
8 + 48x + 15x2 = 0

Solving for variable 'x'.

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

Divide each side by '15'.
0.5333333333 + 3.2x + x2 = 0

Move the constant term to the right:

Add '-0.5333333333' to each side of the equation.
0.5333333333 + 3.2x + -0.5333333333 + x2 = 0 + -0.5333333333

Reorder the terms:
0.5333333333 + -0.5333333333 + 3.2x + x2 = 0 + -0.5333333333

Combine like terms: 0.5333333333 + -0.5333333333 = 0.0000000000
0.0000000000 + 3.2x + x2 = 0 + -0.5333333333
3.2x + x2 = 0 + -0.5333333333

Combine like terms: 0 + -0.5333333333 = -0.5333333333
3.2x + x2 = -0.5333333333

The x term is 3.2x.  Take half its coefficient (1.6).
Square it (2.56) and add it to both sides.

Add '2.56' to each side of the equation.
3.2x + 2.56 + x2 = -0.5333333333 + 2.56

Reorder the terms:
2.56 + 3.2x + x2 = -0.5333333333 + 2.56

Combine like terms: -0.5333333333 + 2.56 = 2.0266666667
2.56 + 3.2x + x2 = 2.0266666667

Factor a perfect square on the left side:
(x + 1.6)(x + 1.6) = 2.0266666667

Calculate the square root of the right side: 1.423610434

Break this problem into two subproblems by setting 
(x + 1.6) equal to 1.423610434 and -1.423610434.

Subproblem 1

x + 1.6 = 1.423610434 Simplifying x + 1.6 = 1.423610434 Reorder the terms: 1.6 + x = 1.423610434 Solving 1.6 + x = 1.423610434 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.6' to each side of the equation. 1.6 + -1.6 + x = 1.423610434 + -1.6 Combine like terms: 1.6 + -1.6 = 0.0 0.0 + x = 1.423610434 + -1.6 x = 1.423610434 + -1.6 Combine like terms: 1.423610434 + -1.6 = -0.176389566 x = -0.176389566 Simplifying x = -0.176389566

Subproblem 2

x + 1.6 = -1.423610434 Simplifying x + 1.6 = -1.423610434 Reorder the terms: 1.6 + x = -1.423610434 Solving 1.6 + x = -1.423610434 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.6' to each side of the equation. 1.6 + -1.6 + x = -1.423610434 + -1.6 Combine like terms: 1.6 + -1.6 = 0.0 0.0 + x = -1.423610434 + -1.6 x = -1.423610434 + -1.6 Combine like terms: -1.423610434 + -1.6 = -3.023610434 x = -3.023610434 Simplifying x = -3.023610434

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.176389566, -3.023610434}

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