5x^2+8x-1760=0

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Solution for 5x^2+8x-1760=0 equation:


Simplifying
5x2 + 8x + -1760 = 0

Reorder the terms:
-1760 + 8x + 5x2 = 0

Solving
-1760 + 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'.
-352 + 1.6x + x2 = 0

Move the constant term to the right:

Add '352' to each side of the equation.
-352 + 1.6x + 352 + x2 = 0 + 352

Reorder the terms:
-352 + 352 + 1.6x + x2 = 0 + 352

Combine like terms: -352 + 352 = 0
0 + 1.6x + x2 = 0 + 352
1.6x + x2 = 0 + 352

Combine like terms: 0 + 352 = 352
1.6x + x2 = 352

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 = 352 + 0.64

Reorder the terms:
0.64 + 1.6x + x2 = 352 + 0.64

Combine like terms: 352 + 0.64 = 352.64
0.64 + 1.6x + x2 = 352.64

Factor a perfect square on the left side:
(x + 0.8)(x + 0.8) = 352.64

Calculate the square root of the right side: 18.778711351

Break this problem into two subproblems by setting 
(x + 0.8) equal to 18.778711351 and -18.778711351.

Subproblem 1

x + 0.8 = 18.778711351 Simplifying x + 0.8 = 18.778711351 Reorder the terms: 0.8 + x = 18.778711351 Solving 0.8 + x = 18.778711351 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 = 18.778711351 + -0.8 Combine like terms: 0.8 + -0.8 = 0.0 0.0 + x = 18.778711351 + -0.8 x = 18.778711351 + -0.8 Combine like terms: 18.778711351 + -0.8 = 17.978711351 x = 17.978711351 Simplifying x = 17.978711351

Subproblem 2

x + 0.8 = -18.778711351 Simplifying x + 0.8 = -18.778711351 Reorder the terms: 0.8 + x = -18.778711351 Solving 0.8 + x = -18.778711351 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 = -18.778711351 + -0.8 Combine like terms: 0.8 + -0.8 = 0.0 0.0 + x = -18.778711351 + -0.8 x = -18.778711351 + -0.8 Combine like terms: -18.778711351 + -0.8 = -19.578711351 x = -19.578711351 Simplifying x = -19.578711351

Solution

The solution to the problem is based on the solutions from the subproblems. x = {17.978711351, -19.578711351}

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