3x^2+35x-75=0

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Solution for 3x^2+35x-75=0 equation:


Simplifying
3x2 + 35x + -75 = 0

Reorder the terms:
-75 + 35x + 3x2 = 0

Solving
-75 + 35x + 3x2 = 0

Solving for variable 'x'.

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

Divide each side by '3'.
-25 + 11.66666667x + x2 = 0

Move the constant term to the right:

Add '25' to each side of the equation.
-25 + 11.66666667x + 25 + x2 = 0 + 25

Reorder the terms:
-25 + 25 + 11.66666667x + x2 = 0 + 25

Combine like terms: -25 + 25 = 0
0 + 11.66666667x + x2 = 0 + 25
11.66666667x + x2 = 0 + 25

Combine like terms: 0 + 25 = 25
11.66666667x + x2 = 25

The x term is 11.66666667x.  Take half its coefficient (5.833333335).
Square it (34.02777780) and add it to both sides.

Add '34.02777780' to each side of the equation.
11.66666667x + 34.02777780 + x2 = 25 + 34.02777780

Reorder the terms:
34.02777780 + 11.66666667x + x2 = 25 + 34.02777780

Combine like terms: 25 + 34.02777780 = 59.0277778
34.02777780 + 11.66666667x + x2 = 59.0277778

Factor a perfect square on the left side:
(x + 5.833333335)(x + 5.833333335) = 59.0277778

Calculate the square root of the right side: 7.682953716

Break this problem into two subproblems by setting 
(x + 5.833333335) equal to 7.682953716 and -7.682953716.

Subproblem 1

x + 5.833333335 = 7.682953716 Simplifying x + 5.833333335 = 7.682953716 Reorder the terms: 5.833333335 + x = 7.682953716 Solving 5.833333335 + x = 7.682953716 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5.833333335' to each side of the equation. 5.833333335 + -5.833333335 + x = 7.682953716 + -5.833333335 Combine like terms: 5.833333335 + -5.833333335 = 0.000000000 0.000000000 + x = 7.682953716 + -5.833333335 x = 7.682953716 + -5.833333335 Combine like terms: 7.682953716 + -5.833333335 = 1.849620381 x = 1.849620381 Simplifying x = 1.849620381

Subproblem 2

x + 5.833333335 = -7.682953716 Simplifying x + 5.833333335 = -7.682953716 Reorder the terms: 5.833333335 + x = -7.682953716 Solving 5.833333335 + x = -7.682953716 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5.833333335' to each side of the equation. 5.833333335 + -5.833333335 + x = -7.682953716 + -5.833333335 Combine like terms: 5.833333335 + -5.833333335 = 0.000000000 0.000000000 + x = -7.682953716 + -5.833333335 x = -7.682953716 + -5.833333335 Combine like terms: -7.682953716 + -5.833333335 = -13.516287051 x = -13.516287051 Simplifying x = -13.516287051

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.849620381, -13.516287051}

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