75x-3x^2-16x+125=

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Solution for 75x-3x^2-16x+125= equation:


Simplifying
75x + -3x2 + -16x + 125 = 0

Reorder the terms:
125 + 75x + -16x + -3x2 = 0

Combine like terms: 75x + -16x = 59x
125 + 59x + -3x2 = 0

Solving
125 + 59x + -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'.
-41.66666667 + -19.66666667x + x2 = 0

Move the constant term to the right:

Add '41.66666667' to each side of the equation.
-41.66666667 + -19.66666667x + 41.66666667 + x2 = 0 + 41.66666667

Reorder the terms:
-41.66666667 + 41.66666667 + -19.66666667x + x2 = 0 + 41.66666667

Combine like terms: -41.66666667 + 41.66666667 = 0.00000000
0.00000000 + -19.66666667x + x2 = 0 + 41.66666667
-19.66666667x + x2 = 0 + 41.66666667

Combine like terms: 0 + 41.66666667 = 41.66666667
-19.66666667x + x2 = 41.66666667

The x term is -19.66666667x.  Take half its coefficient (-9.833333335).
Square it (96.69444448) and add it to both sides.

Add '96.69444448' to each side of the equation.
-19.66666667x + 96.69444448 + x2 = 41.66666667 + 96.69444448

Reorder the terms:
96.69444448 + -19.66666667x + x2 = 41.66666667 + 96.69444448

Combine like terms: 41.66666667 + 96.69444448 = 138.36111115
96.69444448 + -19.66666667x + x2 = 138.36111115

Factor a perfect square on the left side:
(x + -9.833333335)(x + -9.833333335) = 138.36111115

Calculate the square root of the right side: 11.762699994

Break this problem into two subproblems by setting 
(x + -9.833333335) equal to 11.762699994 and -11.762699994.

Subproblem 1

x + -9.833333335 = 11.762699994 Simplifying x + -9.833333335 = 11.762699994 Reorder the terms: -9.833333335 + x = 11.762699994 Solving -9.833333335 + x = 11.762699994 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '9.833333335' to each side of the equation. -9.833333335 + 9.833333335 + x = 11.762699994 + 9.833333335 Combine like terms: -9.833333335 + 9.833333335 = 0.000000000 0.000000000 + x = 11.762699994 + 9.833333335 x = 11.762699994 + 9.833333335 Combine like terms: 11.762699994 + 9.833333335 = 21.596033329 x = 21.596033329 Simplifying x = 21.596033329

Subproblem 2

x + -9.833333335 = -11.762699994 Simplifying x + -9.833333335 = -11.762699994 Reorder the terms: -9.833333335 + x = -11.762699994 Solving -9.833333335 + x = -11.762699994 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '9.833333335' to each side of the equation. -9.833333335 + 9.833333335 + x = -11.762699994 + 9.833333335 Combine like terms: -9.833333335 + 9.833333335 = 0.000000000 0.000000000 + x = -11.762699994 + 9.833333335 x = -11.762699994 + 9.833333335 Combine like terms: -11.762699994 + 9.833333335 = -1.929366659 x = -1.929366659 Simplifying x = -1.929366659

Solution

The solution to the problem is based on the solutions from the subproblems. x = {21.596033329, -1.929366659}

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