5x^2-16x-97=0

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Solution for 5x^2-16x-97=0 equation:


Simplifying
5x2 + -16x + -97 = 0

Reorder the terms:
-97 + -16x + 5x2 = 0

Solving
-97 + -16x + 5x2 = 0

Solving for variable 'x'.

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

Divide each side by '5'.
-19.4 + -3.2x + x2 = 0

Move the constant term to the right:

Add '19.4' to each side of the equation.
-19.4 + -3.2x + 19.4 + x2 = 0 + 19.4

Reorder the terms:
-19.4 + 19.4 + -3.2x + x2 = 0 + 19.4

Combine like terms: -19.4 + 19.4 = 0.0
0.0 + -3.2x + x2 = 0 + 19.4
-3.2x + x2 = 0 + 19.4

Combine like terms: 0 + 19.4 = 19.4
-3.2x + x2 = 19.4

The x term is -3.2x.  Take half its coefficient (-1.6).
Square it (2.56) and add it to both sides.

Add '2.56' to each side of the equation.
-3.2x + 2.56 + x2 = 19.4 + 2.56

Reorder the terms:
2.56 + -3.2x + x2 = 19.4 + 2.56

Combine like terms: 19.4 + 2.56 = 21.96
2.56 + -3.2x + x2 = 21.96

Factor a perfect square on the left side:
(x + -1.6)(x + -1.6) = 21.96

Calculate the square root of the right side: 4.686149806

Break this problem into two subproblems by setting 
(x + -1.6) equal to 4.686149806 and -4.686149806.

Subproblem 1

x + -1.6 = 4.686149806 Simplifying x + -1.6 = 4.686149806 Reorder the terms: -1.6 + x = 4.686149806 Solving -1.6 + x = 4.686149806 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.6' to each side of the equation. -1.6 + 1.6 + x = 4.686149806 + 1.6 Combine like terms: -1.6 + 1.6 = 0.0 0.0 + x = 4.686149806 + 1.6 x = 4.686149806 + 1.6 Combine like terms: 4.686149806 + 1.6 = 6.286149806 x = 6.286149806 Simplifying x = 6.286149806

Subproblem 2

x + -1.6 = -4.686149806 Simplifying x + -1.6 = -4.686149806 Reorder the terms: -1.6 + x = -4.686149806 Solving -1.6 + x = -4.686149806 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.6' to each side of the equation. -1.6 + 1.6 + x = -4.686149806 + 1.6 Combine like terms: -1.6 + 1.6 = 0.0 0.0 + x = -4.686149806 + 1.6 x = -4.686149806 + 1.6 Combine like terms: -4.686149806 + 1.6 = -3.086149806 x = -3.086149806 Simplifying x = -3.086149806

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.286149806, -3.086149806}

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