5x^2+8x-52=0

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Solution for 5x^2+8x-52=0 equation:


Simplifying
5x2 + 8x + -52 = 0

Reorder the terms:
-52 + 8x + 5x2 = 0

Solving
-52 + 8x + 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'.
-10.4 + 1.6x + x2 = 0

Move the constant term to the right:

Add '10.4' to each side of the equation.
-10.4 + 1.6x + 10.4 + x2 = 0 + 10.4

Reorder the terms:
-10.4 + 10.4 + 1.6x + x2 = 0 + 10.4

Combine like terms: -10.4 + 10.4 = 0.0
0.0 + 1.6x + x2 = 0 + 10.4
1.6x + x2 = 0 + 10.4

Combine like terms: 0 + 10.4 = 10.4
1.6x + x2 = 10.4

The x term is 1.6x.  Take half its coefficient (0.8).
Square it (0.64) and add it to both sides.

Add '0.64' to each side of the equation.
1.6x + 0.64 + x2 = 10.4 + 0.64

Reorder the terms:
0.64 + 1.6x + x2 = 10.4 + 0.64

Combine like terms: 10.4 + 0.64 = 11.04
0.64 + 1.6x + x2 = 11.04

Factor a perfect square on the left side:
(x + 0.8)(x + 0.8) = 11.04

Calculate the square root of the right side: 3.322649545

Break this problem into two subproblems by setting 
(x + 0.8) equal to 3.322649545 and -3.322649545.

Subproblem 1

x + 0.8 = 3.322649545 Simplifying x + 0.8 = 3.322649545 Reorder the terms: 0.8 + x = 3.322649545 Solving 0.8 + x = 3.322649545 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.8' to each side of the equation. 0.8 + -0.8 + x = 3.322649545 + -0.8 Combine like terms: 0.8 + -0.8 = 0.0 0.0 + x = 3.322649545 + -0.8 x = 3.322649545 + -0.8 Combine like terms: 3.322649545 + -0.8 = 2.522649545 x = 2.522649545 Simplifying x = 2.522649545

Subproblem 2

x + 0.8 = -3.322649545 Simplifying x + 0.8 = -3.322649545 Reorder the terms: 0.8 + x = -3.322649545 Solving 0.8 + x = -3.322649545 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.8' to each side of the equation. 0.8 + -0.8 + x = -3.322649545 + -0.8 Combine like terms: 0.8 + -0.8 = 0.0 0.0 + x = -3.322649545 + -0.8 x = -3.322649545 + -0.8 Combine like terms: -3.322649545 + -0.8 = -4.122649545 x = -4.122649545 Simplifying x = -4.122649545

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.522649545, -4.122649545}

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