x^2+5.3x-1=0

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Solution for x^2+5.3x-1=0 equation:


Simplifying
x2 + 5.3x + -1 = 0

Reorder the terms:
-1 + 5.3x + x2 = 0

Solving
-1 + 5.3x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '1' to each side of the equation.
-1 + 5.3x + 1 + x2 = 0 + 1

Reorder the terms:
-1 + 1 + 5.3x + x2 = 0 + 1

Combine like terms: -1 + 1 = 0
0 + 5.3x + x2 = 0 + 1
5.3x + x2 = 0 + 1

Combine like terms: 0 + 1 = 1
5.3x + x2 = 1

The x term is 5.3x.  Take half its coefficient (2.65).
Square it (7.0225) and add it to both sides.

Add '7.0225' to each side of the equation.
5.3x + 7.0225 + x2 = 1 + 7.0225

Reorder the terms:
7.0225 + 5.3x + x2 = 1 + 7.0225

Combine like terms: 1 + 7.0225 = 8.0225
7.0225 + 5.3x + x2 = 8.0225

Factor a perfect square on the left side:
(x + 2.65)(x + 2.65) = 8.0225

Calculate the square root of the right side: 2.832401808

Break this problem into two subproblems by setting 
(x + 2.65) equal to 2.832401808 and -2.832401808.

Subproblem 1

x + 2.65 = 2.832401808 Simplifying x + 2.65 = 2.832401808 Reorder the terms: 2.65 + x = 2.832401808 Solving 2.65 + x = 2.832401808 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.65' to each side of the equation. 2.65 + -2.65 + x = 2.832401808 + -2.65 Combine like terms: 2.65 + -2.65 = 0.00 0.00 + x = 2.832401808 + -2.65 x = 2.832401808 + -2.65 Combine like terms: 2.832401808 + -2.65 = 0.182401808 x = 0.182401808 Simplifying x = 0.182401808

Subproblem 2

x + 2.65 = -2.832401808 Simplifying x + 2.65 = -2.832401808 Reorder the terms: 2.65 + x = -2.832401808 Solving 2.65 + x = -2.832401808 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.65' to each side of the equation. 2.65 + -2.65 + x = -2.832401808 + -2.65 Combine like terms: 2.65 + -2.65 = 0.00 0.00 + x = -2.832401808 + -2.65 x = -2.832401808 + -2.65 Combine like terms: -2.832401808 + -2.65 = -5.482401808 x = -5.482401808 Simplifying x = -5.482401808

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.182401808, -5.482401808}

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