x^2+8x+152x=3x^2+5x-7

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Solution for x^2+8x+152x=3x^2+5x-7 equation:


Simplifying
x2 + 8x + 152x = 3x2 + 5x + -7

Reorder the terms:
8x + 152x + x2 = 3x2 + 5x + -7

Combine like terms: 8x + 152x = 160x
160x + x2 = 3x2 + 5x + -7

Reorder the terms:
160x + x2 = -7 + 5x + 3x2

Solving
160x + x2 = -7 + 5x + 3x2

Solving for variable 'x'.

Reorder the terms:
7 + 160x + -5x + x2 + -3x2 = -7 + 5x + 3x2 + 7 + -5x + -3x2

Combine like terms: 160x + -5x = 155x
7 + 155x + x2 + -3x2 = -7 + 5x + 3x2 + 7 + -5x + -3x2

Combine like terms: x2 + -3x2 = -2x2
7 + 155x + -2x2 = -7 + 5x + 3x2 + 7 + -5x + -3x2

Reorder the terms:
7 + 155x + -2x2 = -7 + 7 + 5x + -5x + 3x2 + -3x2

Combine like terms: -7 + 7 = 0
7 + 155x + -2x2 = 0 + 5x + -5x + 3x2 + -3x2
7 + 155x + -2x2 = 5x + -5x + 3x2 + -3x2

Combine like terms: 5x + -5x = 0
7 + 155x + -2x2 = 0 + 3x2 + -3x2
7 + 155x + -2x2 = 3x2 + -3x2

Combine like terms: 3x2 + -3x2 = 0
7 + 155x + -2x2 = 0

Begin completing the square.  Divide all terms by
-2 the coefficient of the squared term: 

Divide each side by '-2'.
-3.5 + -77.5x + x2 = 0

Move the constant term to the right:

Add '3.5' to each side of the equation.
-3.5 + -77.5x + 3.5 + x2 = 0 + 3.5

Reorder the terms:
-3.5 + 3.5 + -77.5x + x2 = 0 + 3.5

Combine like terms: -3.5 + 3.5 = 0.0
0.0 + -77.5x + x2 = 0 + 3.5
-77.5x + x2 = 0 + 3.5

Combine like terms: 0 + 3.5 = 3.5
-77.5x + x2 = 3.5

The x term is -77.5x.  Take half its coefficient (-38.75).
Square it (1501.5625) and add it to both sides.

Add '1501.5625' to each side of the equation.
-77.5x + 1501.5625 + x2 = 3.5 + 1501.5625

Reorder the terms:
1501.5625 + -77.5x + x2 = 3.5 + 1501.5625

Combine like terms: 3.5 + 1501.5625 = 1505.0625
1501.5625 + -77.5x + x2 = 1505.0625

Factor a perfect square on the left side:
(x + -38.75)(x + -38.75) = 1505.0625

Calculate the square root of the right side: 38.795135004

Break this problem into two subproblems by setting 
(x + -38.75) equal to 38.795135004 and -38.795135004.

Subproblem 1

x + -38.75 = 38.795135004 Simplifying x + -38.75 = 38.795135004 Reorder the terms: -38.75 + x = 38.795135004 Solving -38.75 + x = 38.795135004 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '38.75' to each side of the equation. -38.75 + 38.75 + x = 38.795135004 + 38.75 Combine like terms: -38.75 + 38.75 = 0.00 0.00 + x = 38.795135004 + 38.75 x = 38.795135004 + 38.75 Combine like terms: 38.795135004 + 38.75 = 77.545135004 x = 77.545135004 Simplifying x = 77.545135004

Subproblem 2

x + -38.75 = -38.795135004 Simplifying x + -38.75 = -38.795135004 Reorder the terms: -38.75 + x = -38.795135004 Solving -38.75 + x = -38.795135004 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '38.75' to each side of the equation. -38.75 + 38.75 + x = -38.795135004 + 38.75 Combine like terms: -38.75 + 38.75 = 0.00 0.00 + x = -38.795135004 + 38.75 x = -38.795135004 + 38.75 Combine like terms: -38.795135004 + 38.75 = -0.045135004 x = -0.045135004 Simplifying x = -0.045135004

Solution

The solution to the problem is based on the solutions from the subproblems. x = {77.545135004, -0.045135004}

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