6x^2+25x=75

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Solution for 6x^2+25x=75 equation:


Simplifying
6x2 + 25x = 75

Reorder the terms:
25x + 6x2 = 75

Solving
25x + 6x2 = 75

Solving for variable 'x'.

Reorder the terms:
-75 + 25x + 6x2 = 75 + -75

Combine like terms: 75 + -75 = 0
-75 + 25x + 6x2 = 0

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

Divide each side by '6'.
-12.5 + 4.166666667x + x2 = 0

Move the constant term to the right:

Add '12.5' to each side of the equation.
-12.5 + 4.166666667x + 12.5 + x2 = 0 + 12.5

Reorder the terms:
-12.5 + 12.5 + 4.166666667x + x2 = 0 + 12.5

Combine like terms: -12.5 + 12.5 = 0.0
0.0 + 4.166666667x + x2 = 0 + 12.5
4.166666667x + x2 = 0 + 12.5

Combine like terms: 0 + 12.5 = 12.5
4.166666667x + x2 = 12.5

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 = 12.5 + 4.340277781

Reorder the terms:
4.340277781 + 4.166666667x + x2 = 12.5 + 4.340277781

Combine like terms: 12.5 + 4.340277781 = 16.840277781
4.340277781 + 4.166666667x + x2 = 16.840277781

Factor a perfect square on the left side:
(x + 2.083333334)(x + 2.083333334) = 16.840277781

Calculate the square root of the right side: 4.103690751

Break this problem into two subproblems by setting 
(x + 2.083333334) equal to 4.103690751 and -4.103690751.

Subproblem 1

x + 2.083333334 = 4.103690751 Simplifying x + 2.083333334 = 4.103690751 Reorder the terms: 2.083333334 + x = 4.103690751 Solving 2.083333334 + x = 4.103690751 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 = 4.103690751 + -2.083333334 Combine like terms: 2.083333334 + -2.083333334 = 0.000000000 0.000000000 + x = 4.103690751 + -2.083333334 x = 4.103690751 + -2.083333334 Combine like terms: 4.103690751 + -2.083333334 = 2.020357417 x = 2.020357417 Simplifying x = 2.020357417

Subproblem 2

x + 2.083333334 = -4.103690751 Simplifying x + 2.083333334 = -4.103690751 Reorder the terms: 2.083333334 + x = -4.103690751 Solving 2.083333334 + x = -4.103690751 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 = -4.103690751 + -2.083333334 Combine like terms: 2.083333334 + -2.083333334 = 0.000000000 0.000000000 + x = -4.103690751 + -2.083333334 x = -4.103690751 + -2.083333334 Combine like terms: -4.103690751 + -2.083333334 = -6.187024085 x = -6.187024085 Simplifying x = -6.187024085

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.020357417, -6.187024085}

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