6x^2+25x+9=0

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Solution for 6x^2+25x+9=0 equation:


Simplifying
6x2 + 25x + 9 = 0

Reorder the terms:
9 + 25x + 6x2 = 0

Solving
9 + 25x + 6x2 = 0

Solving for variable 'x'.

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

Divide each side by '6'.
1.5 + 4.166666667x + x2 = 0

Move the constant term to the right:

Add '-1.5' to each side of the equation.
1.5 + 4.166666667x + -1.5 + x2 = 0 + -1.5

Reorder the terms:
1.5 + -1.5 + 4.166666667x + x2 = 0 + -1.5

Combine like terms: 1.5 + -1.5 = 0.0
0.0 + 4.166666667x + x2 = 0 + -1.5
4.166666667x + x2 = 0 + -1.5

Combine like terms: 0 + -1.5 = -1.5
4.166666667x + x2 = -1.5

The x term is 4.166666667x.  Take half its coefficient (2.083333334).
Square it (4.340277781) and add it to both sides.

Add '4.340277781' to each side of the equation.
4.166666667x + 4.340277781 + x2 = -1.5 + 4.340277781

Reorder the terms:
4.340277781 + 4.166666667x + x2 = -1.5 + 4.340277781

Combine like terms: -1.5 + 4.340277781 = 2.840277781
4.340277781 + 4.166666667x + x2 = 2.840277781

Factor a perfect square on the left side:
(x + 2.083333334)(x + 2.083333334) = 2.840277781

Calculate the square root of the right side: 1.685312369

Break this problem into two subproblems by setting 
(x + 2.083333334) equal to 1.685312369 and -1.685312369.

Subproblem 1

x + 2.083333334 = 1.685312369 Simplifying x + 2.083333334 = 1.685312369 Reorder the terms: 2.083333334 + x = 1.685312369 Solving 2.083333334 + x = 1.685312369 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.083333334' to each side of the equation. 2.083333334 + -2.083333334 + x = 1.685312369 + -2.083333334 Combine like terms: 2.083333334 + -2.083333334 = 0.000000000 0.000000000 + x = 1.685312369 + -2.083333334 x = 1.685312369 + -2.083333334 Combine like terms: 1.685312369 + -2.083333334 = -0.398020965 x = -0.398020965 Simplifying x = -0.398020965

Subproblem 2

x + 2.083333334 = -1.685312369 Simplifying x + 2.083333334 = -1.685312369 Reorder the terms: 2.083333334 + x = -1.685312369 Solving 2.083333334 + x = -1.685312369 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.083333334' to each side of the equation. 2.083333334 + -2.083333334 + x = -1.685312369 + -2.083333334 Combine like terms: 2.083333334 + -2.083333334 = 0.000000000 0.000000000 + x = -1.685312369 + -2.083333334 x = -1.685312369 + -2.083333334 Combine like terms: -1.685312369 + -2.083333334 = -3.768645703 x = -3.768645703 Simplifying x = -3.768645703

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.398020965, -3.768645703}

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