8x^2+33x+15=

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Solution for 8x^2+33x+15= equation:


Simplifying
8x2 + 33x + 15 = 0

Reorder the terms:
15 + 33x + 8x2 = 0

Solving
15 + 33x + 8x2 = 0

Solving for variable 'x'.

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

Divide each side by '8'.
1.875 + 4.125x + x2 = 0

Move the constant term to the right:

Add '-1.875' to each side of the equation.
1.875 + 4.125x + -1.875 + x2 = 0 + -1.875

Reorder the terms:
1.875 + -1.875 + 4.125x + x2 = 0 + -1.875

Combine like terms: 1.875 + -1.875 = 0.000
0.000 + 4.125x + x2 = 0 + -1.875
4.125x + x2 = 0 + -1.875

Combine like terms: 0 + -1.875 = -1.875
4.125x + x2 = -1.875

The x term is 4.125x.  Take half its coefficient (2.0625).
Square it (4.25390625) and add it to both sides.

Add '4.25390625' to each side of the equation.
4.125x + 4.25390625 + x2 = -1.875 + 4.25390625

Reorder the terms:
4.25390625 + 4.125x + x2 = -1.875 + 4.25390625

Combine like terms: -1.875 + 4.25390625 = 2.37890625
4.25390625 + 4.125x + x2 = 2.37890625

Factor a perfect square on the left side:
(x + 2.0625)(x + 2.0625) = 2.37890625

Calculate the square root of the right side: 1.542370335

Break this problem into two subproblems by setting 
(x + 2.0625) equal to 1.542370335 and -1.542370335.

Subproblem 1

x + 2.0625 = 1.542370335 Simplifying x + 2.0625 = 1.542370335 Reorder the terms: 2.0625 + x = 1.542370335 Solving 2.0625 + x = 1.542370335 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.0625' to each side of the equation. 2.0625 + -2.0625 + x = 1.542370335 + -2.0625 Combine like terms: 2.0625 + -2.0625 = 0.0000 0.0000 + x = 1.542370335 + -2.0625 x = 1.542370335 + -2.0625 Combine like terms: 1.542370335 + -2.0625 = -0.520129665 x = -0.520129665 Simplifying x = -0.520129665

Subproblem 2

x + 2.0625 = -1.542370335 Simplifying x + 2.0625 = -1.542370335 Reorder the terms: 2.0625 + x = -1.542370335 Solving 2.0625 + x = -1.542370335 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.0625' to each side of the equation. 2.0625 + -2.0625 + x = -1.542370335 + -2.0625 Combine like terms: 2.0625 + -2.0625 = 0.0000 0.0000 + x = -1.542370335 + -2.0625 x = -1.542370335 + -2.0625 Combine like terms: -1.542370335 + -2.0625 = -3.604870335 x = -3.604870335 Simplifying x = -3.604870335

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.520129665, -3.604870335}

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