7x^2-25x-200=0

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Solution for 7x^2-25x-200=0 equation:


Simplifying
7x2 + -25x + -200 = 0

Reorder the terms:
-200 + -25x + 7x2 = 0

Solving
-200 + -25x + 7x2 = 0

Solving for variable 'x'.

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

Divide each side by '7'.
-28.57142857 + -3.571428571x + x2 = 0

Move the constant term to the right:

Add '28.57142857' to each side of the equation.
-28.57142857 + -3.571428571x + 28.57142857 + x2 = 0 + 28.57142857

Reorder the terms:
-28.57142857 + 28.57142857 + -3.571428571x + x2 = 0 + 28.57142857

Combine like terms: -28.57142857 + 28.57142857 = 0.00000000
0.00000000 + -3.571428571x + x2 = 0 + 28.57142857
-3.571428571x + x2 = 0 + 28.57142857

Combine like terms: 0 + 28.57142857 = 28.57142857
-3.571428571x + x2 = 28.57142857

The x term is -3.571428571x.  Take half its coefficient (-1.785714286).
Square it (3.188775511) and add it to both sides.

Add '3.188775511' to each side of the equation.
-3.571428571x + 3.188775511 + x2 = 28.57142857 + 3.188775511

Reorder the terms:
3.188775511 + -3.571428571x + x2 = 28.57142857 + 3.188775511

Combine like terms: 28.57142857 + 3.188775511 = 31.760204081
3.188775511 + -3.571428571x + x2 = 31.760204081

Factor a perfect square on the left side:
(x + -1.785714286)(x + -1.785714286) = 31.760204081

Calculate the square root of the right side: 5.635619228

Break this problem into two subproblems by setting 
(x + -1.785714286) equal to 5.635619228 and -5.635619228.

Subproblem 1

x + -1.785714286 = 5.635619228 Simplifying x + -1.785714286 = 5.635619228 Reorder the terms: -1.785714286 + x = 5.635619228 Solving -1.785714286 + x = 5.635619228 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.785714286' to each side of the equation. -1.785714286 + 1.785714286 + x = 5.635619228 + 1.785714286 Combine like terms: -1.785714286 + 1.785714286 = 0.000000000 0.000000000 + x = 5.635619228 + 1.785714286 x = 5.635619228 + 1.785714286 Combine like terms: 5.635619228 + 1.785714286 = 7.421333514 x = 7.421333514 Simplifying x = 7.421333514

Subproblem 2

x + -1.785714286 = -5.635619228 Simplifying x + -1.785714286 = -5.635619228 Reorder the terms: -1.785714286 + x = -5.635619228 Solving -1.785714286 + x = -5.635619228 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.785714286' to each side of the equation. -1.785714286 + 1.785714286 + x = -5.635619228 + 1.785714286 Combine like terms: -1.785714286 + 1.785714286 = 0.000000000 0.000000000 + x = -5.635619228 + 1.785714286 x = -5.635619228 + 1.785714286 Combine like terms: -5.635619228 + 1.785714286 = -3.849904942 x = -3.849904942 Simplifying x = -3.849904942

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.421333514, -3.849904942}

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