4x^2+33x+15=

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Solution for 4x^2+33x+15= equation:


Simplifying
4x2 + 33x + 15 = 0

Reorder the terms:
15 + 33x + 4x2 = 0

Solving
15 + 33x + 4x2 = 0

Solving for variable 'x'.

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

Divide each side by '4'.
3.75 + 8.25x + x2 = 0

Move the constant term to the right:

Add '-3.75' to each side of the equation.
3.75 + 8.25x + -3.75 + x2 = 0 + -3.75

Reorder the terms:
3.75 + -3.75 + 8.25x + x2 = 0 + -3.75

Combine like terms: 3.75 + -3.75 = 0.00
0.00 + 8.25x + x2 = 0 + -3.75
8.25x + x2 = 0 + -3.75

Combine like terms: 0 + -3.75 = -3.75
8.25x + x2 = -3.75

The x term is 8.25x.  Take half its coefficient (4.125).
Square it (17.015625) and add it to both sides.

Add '17.015625' to each side of the equation.
8.25x + 17.015625 + x2 = -3.75 + 17.015625

Reorder the terms:
17.015625 + 8.25x + x2 = -3.75 + 17.015625

Combine like terms: -3.75 + 17.015625 = 13.265625
17.015625 + 8.25x + x2 = 13.265625

Factor a perfect square on the left side:
(x + 4.125)(x + 4.125) = 13.265625

Calculate the square root of the right side: 3.642200571

Break this problem into two subproblems by setting 
(x + 4.125) equal to 3.642200571 and -3.642200571.

Subproblem 1

x + 4.125 = 3.642200571 Simplifying x + 4.125 = 3.642200571 Reorder the terms: 4.125 + x = 3.642200571 Solving 4.125 + x = 3.642200571 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.125' to each side of the equation. 4.125 + -4.125 + x = 3.642200571 + -4.125 Combine like terms: 4.125 + -4.125 = 0.000 0.000 + x = 3.642200571 + -4.125 x = 3.642200571 + -4.125 Combine like terms: 3.642200571 + -4.125 = -0.482799429 x = -0.482799429 Simplifying x = -0.482799429

Subproblem 2

x + 4.125 = -3.642200571 Simplifying x + 4.125 = -3.642200571 Reorder the terms: 4.125 + x = -3.642200571 Solving 4.125 + x = -3.642200571 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.125' to each side of the equation. 4.125 + -4.125 + x = -3.642200571 + -4.125 Combine like terms: 4.125 + -4.125 = 0.000 0.000 + x = -3.642200571 + -4.125 x = -3.642200571 + -4.125 Combine like terms: -3.642200571 + -4.125 = -7.767200571 x = -7.767200571 Simplifying x = -7.767200571

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.482799429, -7.767200571}

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