1.96x^2-8x-7000=0

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Solution for 1.96x^2-8x-7000=0 equation:


Simplifying
1.96x2 + -8x + -7000 = 0

Reorder the terms:
-7000 + -8x + 1.96x2 = 0

Solving
-7000 + -8x + 1.96x2 = 0

Solving for variable 'x'.

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

Divide each side by '1.96'.
-3571.428571 + -4.081632653x + x2 = 0

Move the constant term to the right:

Add '3571.428571' to each side of the equation.
-3571.428571 + -4.081632653x + 3571.428571 + x2 = 0 + 3571.428571

Reorder the terms:
-3571.428571 + 3571.428571 + -4.081632653x + x2 = 0 + 3571.428571

Combine like terms: -3571.428571 + 3571.428571 = 0.000000
0.000000 + -4.081632653x + x2 = 0 + 3571.428571
-4.081632653x + x2 = 0 + 3571.428571

Combine like terms: 0 + 3571.428571 = 3571.428571
-4.081632653x + x2 = 3571.428571

The x term is -4.081632653x.  Take half its coefficient (-2.040816327).
Square it (4.164931281) and add it to both sides.

Add '4.164931281' to each side of the equation.
-4.081632653x + 4.164931281 + x2 = 3571.428571 + 4.164931281

Reorder the terms:
4.164931281 + -4.081632653x + x2 = 3571.428571 + 4.164931281

Combine like terms: 3571.428571 + 4.164931281 = 3575.593502281
4.164931281 + -4.081632653x + x2 = 3575.593502281

Factor a perfect square on the left side:
(x + -2.040816327)(x + -2.040816327) = 3575.593502281

Calculate the square root of the right side: 59.796266625

Break this problem into two subproblems by setting 
(x + -2.040816327) equal to 59.796266625 and -59.796266625.

Subproblem 1

x + -2.040816327 = 59.796266625 Simplifying x + -2.040816327 = 59.796266625 Reorder the terms: -2.040816327 + x = 59.796266625 Solving -2.040816327 + x = 59.796266625 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.040816327' to each side of the equation. -2.040816327 + 2.040816327 + x = 59.796266625 + 2.040816327 Combine like terms: -2.040816327 + 2.040816327 = 0.000000000 0.000000000 + x = 59.796266625 + 2.040816327 x = 59.796266625 + 2.040816327 Combine like terms: 59.796266625 + 2.040816327 = 61.837082952 x = 61.837082952 Simplifying x = 61.837082952

Subproblem 2

x + -2.040816327 = -59.796266625 Simplifying x + -2.040816327 = -59.796266625 Reorder the terms: -2.040816327 + x = -59.796266625 Solving -2.040816327 + x = -59.796266625 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.040816327' to each side of the equation. -2.040816327 + 2.040816327 + x = -59.796266625 + 2.040816327 Combine like terms: -2.040816327 + 2.040816327 = 0.000000000 0.000000000 + x = -59.796266625 + 2.040816327 x = -59.796266625 + 2.040816327 Combine like terms: -59.796266625 + 2.040816327 = -57.755450298 x = -57.755450298 Simplifying x = -57.755450298

Solution

The solution to the problem is based on the solutions from the subproblems. x = {61.837082952, -57.755450298}

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