5x^2-48x-80=0

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Solution for 5x^2-48x-80=0 equation:


Simplifying
5x2 + -48x + -80 = 0

Reorder the terms:
-80 + -48x + 5x2 = 0

Solving
-80 + -48x + 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'.
-16 + -9.6x + x2 = 0

Move the constant term to the right:

Add '16' to each side of the equation.
-16 + -9.6x + 16 + x2 = 0 + 16

Reorder the terms:
-16 + 16 + -9.6x + x2 = 0 + 16

Combine like terms: -16 + 16 = 0
0 + -9.6x + x2 = 0 + 16
-9.6x + x2 = 0 + 16

Combine like terms: 0 + 16 = 16
-9.6x + x2 = 16

The x term is -9.6x.  Take half its coefficient (-4.8).
Square it (23.04) and add it to both sides.

Add '23.04' to each side of the equation.
-9.6x + 23.04 + x2 = 16 + 23.04

Reorder the terms:
23.04 + -9.6x + x2 = 16 + 23.04

Combine like terms: 16 + 23.04 = 39.04
23.04 + -9.6x + x2 = 39.04

Factor a perfect square on the left side:
(x + -4.8)(x + -4.8) = 39.04

Calculate the square root of the right side: 6.248199741

Break this problem into two subproblems by setting 
(x + -4.8) equal to 6.248199741 and -6.248199741.

Subproblem 1

x + -4.8 = 6.248199741 Simplifying x + -4.8 = 6.248199741 Reorder the terms: -4.8 + x = 6.248199741 Solving -4.8 + x = 6.248199741 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.8' to each side of the equation. -4.8 + 4.8 + x = 6.248199741 + 4.8 Combine like terms: -4.8 + 4.8 = 0.0 0.0 + x = 6.248199741 + 4.8 x = 6.248199741 + 4.8 Combine like terms: 6.248199741 + 4.8 = 11.048199741 x = 11.048199741 Simplifying x = 11.048199741

Subproblem 2

x + -4.8 = -6.248199741 Simplifying x + -4.8 = -6.248199741 Reorder the terms: -4.8 + x = -6.248199741 Solving -4.8 + x = -6.248199741 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.8' to each side of the equation. -4.8 + 4.8 + x = -6.248199741 + 4.8 Combine like terms: -4.8 + 4.8 = 0.0 0.0 + x = -6.248199741 + 4.8 x = -6.248199741 + 4.8 Combine like terms: -6.248199741 + 4.8 = -1.448199741 x = -1.448199741 Simplifying x = -1.448199741

Solution

The solution to the problem is based on the solutions from the subproblems. x = {11.048199741, -1.448199741}

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