3x^2+x^2-75x-25=0

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Solution for 3x^2+x^2-75x-25=0 equation:


Simplifying
3x2 + x2 + -75x + -25 = 0

Reorder the terms:
-25 + -75x + 3x2 + x2 = 0

Combine like terms: 3x2 + x2 = 4x2
-25 + -75x + 4x2 = 0

Solving
-25 + -75x + 4x2 = 0

Solving for variable 'x'.

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

Divide each side by '4'.
-6.25 + -18.75x + x2 = 0

Move the constant term to the right:

Add '6.25' to each side of the equation.
-6.25 + -18.75x + 6.25 + x2 = 0 + 6.25

Reorder the terms:
-6.25 + 6.25 + -18.75x + x2 = 0 + 6.25

Combine like terms: -6.25 + 6.25 = 0.00
0.00 + -18.75x + x2 = 0 + 6.25
-18.75x + x2 = 0 + 6.25

Combine like terms: 0 + 6.25 = 6.25
-18.75x + x2 = 6.25

The x term is -18.75x.  Take half its coefficient (-9.375).
Square it (87.890625) and add it to both sides.

Add '87.890625' to each side of the equation.
-18.75x + 87.890625 + x2 = 6.25 + 87.890625

Reorder the terms:
87.890625 + -18.75x + x2 = 6.25 + 87.890625

Combine like terms: 6.25 + 87.890625 = 94.140625
87.890625 + -18.75x + x2 = 94.140625

Factor a perfect square on the left side:
(x + -9.375)(x + -9.375) = 94.140625

Calculate the square root of the right side: 9.702609185

Break this problem into two subproblems by setting 
(x + -9.375) equal to 9.702609185 and -9.702609185.

Subproblem 1

x + -9.375 = 9.702609185 Simplifying x + -9.375 = 9.702609185 Reorder the terms: -9.375 + x = 9.702609185 Solving -9.375 + x = 9.702609185 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '9.375' to each side of the equation. -9.375 + 9.375 + x = 9.702609185 + 9.375 Combine like terms: -9.375 + 9.375 = 0.000 0.000 + x = 9.702609185 + 9.375 x = 9.702609185 + 9.375 Combine like terms: 9.702609185 + 9.375 = 19.077609185 x = 19.077609185 Simplifying x = 19.077609185

Subproblem 2

x + -9.375 = -9.702609185 Simplifying x + -9.375 = -9.702609185 Reorder the terms: -9.375 + x = -9.702609185 Solving -9.375 + x = -9.702609185 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '9.375' to each side of the equation. -9.375 + 9.375 + x = -9.702609185 + 9.375 Combine like terms: -9.375 + 9.375 = 0.000 0.000 + x = -9.702609185 + 9.375 x = -9.702609185 + 9.375 Combine like terms: -9.702609185 + 9.375 = -0.327609185 x = -0.327609185 Simplifying x = -0.327609185

Solution

The solution to the problem is based on the solutions from the subproblems. x = {19.077609185, -0.327609185}

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