4x^2+48x+20=16x-39

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Solution for 4x^2+48x+20=16x-39 equation:


Simplifying
4x2 + 48x + 20 = 16x + -39

Reorder the terms:
20 + 48x + 4x2 = 16x + -39

Reorder the terms:
20 + 48x + 4x2 = -39 + 16x

Solving
20 + 48x + 4x2 = -39 + 16x

Solving for variable 'x'.

Reorder the terms:
20 + 39 + 48x + -16x + 4x2 = -39 + 16x + 39 + -16x

Combine like terms: 20 + 39 = 59
59 + 48x + -16x + 4x2 = -39 + 16x + 39 + -16x

Combine like terms: 48x + -16x = 32x
59 + 32x + 4x2 = -39 + 16x + 39 + -16x

Reorder the terms:
59 + 32x + 4x2 = -39 + 39 + 16x + -16x

Combine like terms: -39 + 39 = 0
59 + 32x + 4x2 = 0 + 16x + -16x
59 + 32x + 4x2 = 16x + -16x

Combine like terms: 16x + -16x = 0
59 + 32x + 4x2 = 0

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

Divide each side by '4'.
14.75 + 8x + x2 = 0

Move the constant term to the right:

Add '-14.75' to each side of the equation.
14.75 + 8x + -14.75 + x2 = 0 + -14.75

Reorder the terms:
14.75 + -14.75 + 8x + x2 = 0 + -14.75

Combine like terms: 14.75 + -14.75 = 0.00
0.00 + 8x + x2 = 0 + -14.75
8x + x2 = 0 + -14.75

Combine like terms: 0 + -14.75 = -14.75
8x + x2 = -14.75

The x term is 8x.  Take half its coefficient (4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
8x + 16 + x2 = -14.75 + 16

Reorder the terms:
16 + 8x + x2 = -14.75 + 16

Combine like terms: -14.75 + 16 = 1.25
16 + 8x + x2 = 1.25

Factor a perfect square on the left side:
(x + 4)(x + 4) = 1.25

Calculate the square root of the right side: 1.118033989

Break this problem into two subproblems by setting 
(x + 4) equal to 1.118033989 and -1.118033989.

Subproblem 1

x + 4 = 1.118033989 Simplifying x + 4 = 1.118033989 Reorder the terms: 4 + x = 1.118033989 Solving 4 + x = 1.118033989 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + x = 1.118033989 + -4 Combine like terms: 4 + -4 = 0 0 + x = 1.118033989 + -4 x = 1.118033989 + -4 Combine like terms: 1.118033989 + -4 = -2.881966011 x = -2.881966011 Simplifying x = -2.881966011

Subproblem 2

x + 4 = -1.118033989 Simplifying x + 4 = -1.118033989 Reorder the terms: 4 + x = -1.118033989 Solving 4 + x = -1.118033989 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + x = -1.118033989 + -4 Combine like terms: 4 + -4 = 0 0 + x = -1.118033989 + -4 x = -1.118033989 + -4 Combine like terms: -1.118033989 + -4 = -5.118033989 x = -5.118033989 Simplifying x = -5.118033989

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-2.881966011, -5.118033989}

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