2x^2+4x-97=0

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Solution for 2x^2+4x-97=0 equation:


Simplifying
2x2 + 4x + -97 = 0

Reorder the terms:
-97 + 4x + 2x2 = 0

Solving
-97 + 4x + 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 + 2x + x2 = 0

Move the constant term to the right:

Add '48.5' to each side of the equation.
-48.5 + 2x + 48.5 + x2 = 0 + 48.5

Reorder the terms:
-48.5 + 48.5 + 2x + x2 = 0 + 48.5

Combine like terms: -48.5 + 48.5 = 0.0
0.0 + 2x + x2 = 0 + 48.5
2x + x2 = 0 + 48.5

Combine like terms: 0 + 48.5 = 48.5
2x + x2 = 48.5

The x term is 2x.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2x + 1 + x2 = 48.5 + 1

Reorder the terms:
1 + 2x + x2 = 48.5 + 1

Combine like terms: 48.5 + 1 = 49.5
1 + 2x + x2 = 49.5

Factor a perfect square on the left side:
(x + 1)(x + 1) = 49.5

Calculate the square root of the right side: 7.03562364

Break this problem into two subproblems by setting 
(x + 1) equal to 7.03562364 and -7.03562364.

Subproblem 1

x + 1 = 7.03562364 Simplifying x + 1 = 7.03562364 Reorder the terms: 1 + x = 7.03562364 Solving 1 + x = 7.03562364 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = 7.03562364 + -1 Combine like terms: 1 + -1 = 0 0 + x = 7.03562364 + -1 x = 7.03562364 + -1 Combine like terms: 7.03562364 + -1 = 6.03562364 x = 6.03562364 Simplifying x = 6.03562364

Subproblem 2

x + 1 = -7.03562364 Simplifying x + 1 = -7.03562364 Reorder the terms: 1 + x = -7.03562364 Solving 1 + x = -7.03562364 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = -7.03562364 + -1 Combine like terms: 1 + -1 = 0 0 + x = -7.03562364 + -1 x = -7.03562364 + -1 Combine like terms: -7.03562364 + -1 = -8.03562364 x = -8.03562364 Simplifying x = -8.03562364

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.03562364, -8.03562364}

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