5x^2=34+(8x+38)

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Solution for 5x^2=34+(8x+38) equation:


Simplifying
5x2 = 34 + (8x + 38)

Reorder the terms:
5x2 = 34 + (38 + 8x)

Remove parenthesis around (38 + 8x)
5x2 = 34 + 38 + 8x

Combine like terms: 34 + 38 = 72
5x2 = 72 + 8x

Solving
5x2 = 72 + 8x

Solving for variable 'x'.

Reorder the terms:
-72 + -8x + 5x2 = 72 + 8x + -72 + -8x

Reorder the terms:
-72 + -8x + 5x2 = 72 + -72 + 8x + -8x

Combine like terms: 72 + -72 = 0
-72 + -8x + 5x2 = 0 + 8x + -8x
-72 + -8x + 5x2 = 8x + -8x

Combine like terms: 8x + -8x = 0
-72 + -8x + 5x2 = 0

Begin completing the square.  Divide all terms by
5 the coefficient of the squared term: 

Divide each side by '5'.
-14.4 + -1.6x + x2 = 0

Move the constant term to the right:

Add '14.4' to each side of the equation.
-14.4 + -1.6x + 14.4 + x2 = 0 + 14.4

Reorder the terms:
-14.4 + 14.4 + -1.6x + x2 = 0 + 14.4

Combine like terms: -14.4 + 14.4 = 0.0
0.0 + -1.6x + x2 = 0 + 14.4
-1.6x + x2 = 0 + 14.4

Combine like terms: 0 + 14.4 = 14.4
-1.6x + x2 = 14.4

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 = 14.4 + 0.64

Reorder the terms:
0.64 + -1.6x + x2 = 14.4 + 0.64

Combine like terms: 14.4 + 0.64 = 15.04
0.64 + -1.6x + x2 = 15.04

Factor a perfect square on the left side:
(x + -0.8)(x + -0.8) = 15.04

Calculate the square root of the right side: 3.878143886

Break this problem into two subproblems by setting 
(x + -0.8) equal to 3.878143886 and -3.878143886.

Subproblem 1

x + -0.8 = 3.878143886 Simplifying x + -0.8 = 3.878143886 Reorder the terms: -0.8 + x = 3.878143886 Solving -0.8 + x = 3.878143886 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 = 3.878143886 + 0.8 Combine like terms: -0.8 + 0.8 = 0.0 0.0 + x = 3.878143886 + 0.8 x = 3.878143886 + 0.8 Combine like terms: 3.878143886 + 0.8 = 4.678143886 x = 4.678143886 Simplifying x = 4.678143886

Subproblem 2

x + -0.8 = -3.878143886 Simplifying x + -0.8 = -3.878143886 Reorder the terms: -0.8 + x = -3.878143886 Solving -0.8 + x = -3.878143886 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 = -3.878143886 + 0.8 Combine like terms: -0.8 + 0.8 = 0.0 0.0 + x = -3.878143886 + 0.8 x = -3.878143886 + 0.8 Combine like terms: -3.878143886 + 0.8 = -3.078143886 x = -3.078143886 Simplifying x = -3.078143886

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.678143886, -3.078143886}

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