5x^2+31x-48=0

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Solution for 5x^2+31x-48=0 equation:


Simplifying
5x2 + 31x + -48 = 0

Reorder the terms:
-48 + 31x + 5x2 = 0

Solving
-48 + 31x + 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'.
-9.6 + 6.2x + x2 = 0

Move the constant term to the right:

Add '9.6' to each side of the equation.
-9.6 + 6.2x + 9.6 + x2 = 0 + 9.6

Reorder the terms:
-9.6 + 9.6 + 6.2x + x2 = 0 + 9.6

Combine like terms: -9.6 + 9.6 = 0.0
0.0 + 6.2x + x2 = 0 + 9.6
6.2x + x2 = 0 + 9.6

Combine like terms: 0 + 9.6 = 9.6
6.2x + x2 = 9.6

The x term is 6.2x.  Take half its coefficient (3.1).
Square it (9.61) and add it to both sides.

Add '9.61' to each side of the equation.
6.2x + 9.61 + x2 = 9.6 + 9.61

Reorder the terms:
9.61 + 6.2x + x2 = 9.6 + 9.61

Combine like terms: 9.6 + 9.61 = 19.21
9.61 + 6.2x + x2 = 19.21

Factor a perfect square on the left side:
(x + 3.1)(x + 3.1) = 19.21

Calculate the square root of the right side: 4.3829214

Break this problem into two subproblems by setting 
(x + 3.1) equal to 4.3829214 and -4.3829214.

Subproblem 1

x + 3.1 = 4.3829214 Simplifying x + 3.1 = 4.3829214 Reorder the terms: 3.1 + x = 4.3829214 Solving 3.1 + x = 4.3829214 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.1' to each side of the equation. 3.1 + -3.1 + x = 4.3829214 + -3.1 Combine like terms: 3.1 + -3.1 = 0.0 0.0 + x = 4.3829214 + -3.1 x = 4.3829214 + -3.1 Combine like terms: 4.3829214 + -3.1 = 1.2829214 x = 1.2829214 Simplifying x = 1.2829214

Subproblem 2

x + 3.1 = -4.3829214 Simplifying x + 3.1 = -4.3829214 Reorder the terms: 3.1 + x = -4.3829214 Solving 3.1 + x = -4.3829214 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.1' to each side of the equation. 3.1 + -3.1 + x = -4.3829214 + -3.1 Combine like terms: 3.1 + -3.1 = 0.0 0.0 + x = -4.3829214 + -3.1 x = -4.3829214 + -3.1 Combine like terms: -4.3829214 + -3.1 = -7.4829214 x = -7.4829214 Simplifying x = -7.4829214

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.2829214, -7.4829214}

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