2x^2-7x-97=0

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Solution for 2x^2-7x-97=0 equation:


Simplifying
2x2 + -7x + -97 = 0

Reorder the terms:
-97 + -7x + 2x2 = 0

Solving
-97 + -7x + 2x2 = 0

Solving for variable 'x'.

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

Divide each side by '2'.
-48.5 + -3.5x + x2 = 0

Move the constant term to the right:

Add '48.5' to each side of the equation.
-48.5 + -3.5x + 48.5 + x2 = 0 + 48.5

Reorder the terms:
-48.5 + 48.5 + -3.5x + x2 = 0 + 48.5

Combine like terms: -48.5 + 48.5 = 0.0
0.0 + -3.5x + x2 = 0 + 48.5
-3.5x + x2 = 0 + 48.5

Combine like terms: 0 + 48.5 = 48.5
-3.5x + x2 = 48.5

The x term is -3.5x.  Take half its coefficient (-1.75).
Square it (3.0625) and add it to both sides.

Add '3.0625' to each side of the equation.
-3.5x + 3.0625 + x2 = 48.5 + 3.0625

Reorder the terms:
3.0625 + -3.5x + x2 = 48.5 + 3.0625

Combine like terms: 48.5 + 3.0625 = 51.5625
3.0625 + -3.5x + x2 = 51.5625

Factor a perfect square on the left side:
(x + -1.75)(x + -1.75) = 51.5625

Calculate the square root of the right side: 7.180703308

Break this problem into two subproblems by setting 
(x + -1.75) equal to 7.180703308 and -7.180703308.

Subproblem 1

x + -1.75 = 7.180703308 Simplifying x + -1.75 = 7.180703308 Reorder the terms: -1.75 + x = 7.180703308 Solving -1.75 + x = 7.180703308 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.75' to each side of the equation. -1.75 + 1.75 + x = 7.180703308 + 1.75 Combine like terms: -1.75 + 1.75 = 0.00 0.00 + x = 7.180703308 + 1.75 x = 7.180703308 + 1.75 Combine like terms: 7.180703308 + 1.75 = 8.930703308 x = 8.930703308 Simplifying x = 8.930703308

Subproblem 2

x + -1.75 = -7.180703308 Simplifying x + -1.75 = -7.180703308 Reorder the terms: -1.75 + x = -7.180703308 Solving -1.75 + x = -7.180703308 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.75' to each side of the equation. -1.75 + 1.75 + x = -7.180703308 + 1.75 Combine like terms: -1.75 + 1.75 = 0.00 0.00 + x = -7.180703308 + 1.75 x = -7.180703308 + 1.75 Combine like terms: -7.180703308 + 1.75 = -5.430703308 x = -5.430703308 Simplifying x = -5.430703308

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.930703308, -5.430703308}

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