6x^2+7x-45=0

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Solution for 6x^2+7x-45=0 equation:


Simplifying
6x2 + 7x + -45 = 0

Reorder the terms:
-45 + 7x + 6x2 = 0

Solving
-45 + 7x + 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'.
-7.5 + 1.166666667x + x2 = 0

Move the constant term to the right:

Add '7.5' to each side of the equation.
-7.5 + 1.166666667x + 7.5 + x2 = 0 + 7.5

Reorder the terms:
-7.5 + 7.5 + 1.166666667x + x2 = 0 + 7.5

Combine like terms: -7.5 + 7.5 = 0.0
0.0 + 1.166666667x + x2 = 0 + 7.5
1.166666667x + x2 = 0 + 7.5

Combine like terms: 0 + 7.5 = 7.5
1.166666667x + x2 = 7.5

The x term is 1.166666667x.  Take half its coefficient (0.5833333335).
Square it (0.3402777780) and add it to both sides.

Add '0.3402777780' to each side of the equation.
1.166666667x + 0.3402777780 + x2 = 7.5 + 0.3402777780

Reorder the terms:
0.3402777780 + 1.166666667x + x2 = 7.5 + 0.3402777780

Combine like terms: 7.5 + 0.3402777780 = 7.840277778
0.3402777780 + 1.166666667x + x2 = 7.840277778

Factor a perfect square on the left side:
(x + 0.5833333335)(x + 0.5833333335) = 7.840277778

Calculate the square root of the right side: 2.800049603

Break this problem into two subproblems by setting 
(x + 0.5833333335) equal to 2.800049603 and -2.800049603.

Subproblem 1

x + 0.5833333335 = 2.800049603 Simplifying x + 0.5833333335 = 2.800049603 Reorder the terms: 0.5833333335 + x = 2.800049603 Solving 0.5833333335 + x = 2.800049603 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5833333335' to each side of the equation. 0.5833333335 + -0.5833333335 + x = 2.800049603 + -0.5833333335 Combine like terms: 0.5833333335 + -0.5833333335 = 0.0000000000 0.0000000000 + x = 2.800049603 + -0.5833333335 x = 2.800049603 + -0.5833333335 Combine like terms: 2.800049603 + -0.5833333335 = 2.2167162695 x = 2.2167162695 Simplifying x = 2.2167162695

Subproblem 2

x + 0.5833333335 = -2.800049603 Simplifying x + 0.5833333335 = -2.800049603 Reorder the terms: 0.5833333335 + x = -2.800049603 Solving 0.5833333335 + x = -2.800049603 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5833333335' to each side of the equation. 0.5833333335 + -0.5833333335 + x = -2.800049603 + -0.5833333335 Combine like terms: 0.5833333335 + -0.5833333335 = 0.0000000000 0.0000000000 + x = -2.800049603 + -0.5833333335 x = -2.800049603 + -0.5833333335 Combine like terms: -2.800049603 + -0.5833333335 = -3.3833829365 x = -3.3833829365 Simplifying x = -3.3833829365

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.2167162695, -3.3833829365}

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