3x^2-50x-105=0

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Solution for 3x^2-50x-105=0 equation:


Simplifying
3x2 + -50x + -105 = 0

Reorder the terms:
-105 + -50x + 3x2 = 0

Solving
-105 + -50x + 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'.
-35 + -16.66666667x + x2 = 0

Move the constant term to the right:

Add '35' to each side of the equation.
-35 + -16.66666667x + 35 + x2 = 0 + 35

Reorder the terms:
-35 + 35 + -16.66666667x + x2 = 0 + 35

Combine like terms: -35 + 35 = 0
0 + -16.66666667x + x2 = 0 + 35
-16.66666667x + x2 = 0 + 35

Combine like terms: 0 + 35 = 35
-16.66666667x + x2 = 35

The x term is -16.66666667x.  Take half its coefficient (-8.333333335).
Square it (69.44444447) and add it to both sides.

Add '69.44444447' to each side of the equation.
-16.66666667x + 69.44444447 + x2 = 35 + 69.44444447

Reorder the terms:
69.44444447 + -16.66666667x + x2 = 35 + 69.44444447

Combine like terms: 35 + 69.44444447 = 104.44444447
69.44444447 + -16.66666667x + x2 = 104.44444447

Factor a perfect square on the left side:
(x + -8.333333335)(x + -8.333333335) = 104.44444447

Calculate the square root of the right side: 10.219806479

Break this problem into two subproblems by setting 
(x + -8.333333335) equal to 10.219806479 and -10.219806479.

Subproblem 1

x + -8.333333335 = 10.219806479 Simplifying x + -8.333333335 = 10.219806479 Reorder the terms: -8.333333335 + x = 10.219806479 Solving -8.333333335 + x = 10.219806479 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '8.333333335' to each side of the equation. -8.333333335 + 8.333333335 + x = 10.219806479 + 8.333333335 Combine like terms: -8.333333335 + 8.333333335 = 0.000000000 0.000000000 + x = 10.219806479 + 8.333333335 x = 10.219806479 + 8.333333335 Combine like terms: 10.219806479 + 8.333333335 = 18.553139814 x = 18.553139814 Simplifying x = 18.553139814

Subproblem 2

x + -8.333333335 = -10.219806479 Simplifying x + -8.333333335 = -10.219806479 Reorder the terms: -8.333333335 + x = -10.219806479 Solving -8.333333335 + x = -10.219806479 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '8.333333335' to each side of the equation. -8.333333335 + 8.333333335 + x = -10.219806479 + 8.333333335 Combine like terms: -8.333333335 + 8.333333335 = 0.000000000 0.000000000 + x = -10.219806479 + 8.333333335 x = -10.219806479 + 8.333333335 Combine like terms: -10.219806479 + 8.333333335 = -1.886473144 x = -1.886473144 Simplifying x = -1.886473144

Solution

The solution to the problem is based on the solutions from the subproblems. x = {18.553139814, -1.886473144}

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