18x^2-x-75=

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Solution for 18x^2-x-75= equation:


Simplifying
18x2 + -1x + -75 = 0

Reorder the terms:
-75 + -1x + 18x2 = 0

Solving
-75 + -1x + 18x2 = 0

Solving for variable 'x'.

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

Divide each side by '18'.
-4.166666667 + -0.05555555556x + x2 = 0

Move the constant term to the right:

Add '4.166666667' to each side of the equation.
-4.166666667 + -0.05555555556x + 4.166666667 + x2 = 0 + 4.166666667

Reorder the terms:
-4.166666667 + 4.166666667 + -0.05555555556x + x2 = 0 + 4.166666667

Combine like terms: -4.166666667 + 4.166666667 = 0.000000000
0.000000000 + -0.05555555556x + x2 = 0 + 4.166666667
-0.05555555556x + x2 = 0 + 4.166666667

Combine like terms: 0 + 4.166666667 = 4.166666667
-0.05555555556x + x2 = 4.166666667

The x term is -0.05555555556x.  Take half its coefficient (-0.02777777778).
Square it (0.0007716049384) and add it to both sides.

Add '0.0007716049384' to each side of the equation.
-0.05555555556x + 0.0007716049384 + x2 = 4.166666667 + 0.0007716049384

Reorder the terms:
0.0007716049384 + -0.05555555556x + x2 = 4.166666667 + 0.0007716049384

Combine like terms: 4.166666667 + 0.0007716049384 = 4.1674382719384
0.0007716049384 + -0.05555555556x + x2 = 4.1674382719384

Factor a perfect square on the left side:
(x + -0.02777777778)(x + -0.02777777778) = 4.1674382719384

Calculate the square root of the right side: 2.041430447

Break this problem into two subproblems by setting 
(x + -0.02777777778) equal to 2.041430447 and -2.041430447.

Subproblem 1

x + -0.02777777778 = 2.041430447 Simplifying x + -0.02777777778 = 2.041430447 Reorder the terms: -0.02777777778 + x = 2.041430447 Solving -0.02777777778 + x = 2.041430447 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.02777777778' to each side of the equation. -0.02777777778 + 0.02777777778 + x = 2.041430447 + 0.02777777778 Combine like terms: -0.02777777778 + 0.02777777778 = 0.00000000000 0.00000000000 + x = 2.041430447 + 0.02777777778 x = 2.041430447 + 0.02777777778 Combine like terms: 2.041430447 + 0.02777777778 = 2.06920822478 x = 2.06920822478 Simplifying x = 2.06920822478

Subproblem 2

x + -0.02777777778 = -2.041430447 Simplifying x + -0.02777777778 = -2.041430447 Reorder the terms: -0.02777777778 + x = -2.041430447 Solving -0.02777777778 + x = -2.041430447 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.02777777778' to each side of the equation. -0.02777777778 + 0.02777777778 + x = -2.041430447 + 0.02777777778 Combine like terms: -0.02777777778 + 0.02777777778 = 0.00000000000 0.00000000000 + x = -2.041430447 + 0.02777777778 x = -2.041430447 + 0.02777777778 Combine like terms: -2.041430447 + 0.02777777778 = -2.01365266922 x = -2.01365266922 Simplifying x = -2.01365266922

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.06920822478, -2.01365266922}

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