4(2x+3)=-3x(x-1)+31

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Solution for 4(2x+3)=-3x(x-1)+31 equation:


Simplifying
4(2x + 3) = -3x(x + -1) + 31

Reorder the terms:
4(3 + 2x) = -3x(x + -1) + 31
(3 * 4 + 2x * 4) = -3x(x + -1) + 31
(12 + 8x) = -3x(x + -1) + 31

Reorder the terms:
12 + 8x = -3x(-1 + x) + 31
12 + 8x = (-1 * -3x + x * -3x) + 31
12 + 8x = (3x + -3x2) + 31

Reorder the terms:
12 + 8x = 31 + 3x + -3x2

Solving
12 + 8x = 31 + 3x + -3x2

Solving for variable 'x'.

Reorder the terms:
12 + -31 + 8x + -3x + 3x2 = 31 + 3x + -3x2 + -31 + -3x + 3x2

Combine like terms: 12 + -31 = -19
-19 + 8x + -3x + 3x2 = 31 + 3x + -3x2 + -31 + -3x + 3x2

Combine like terms: 8x + -3x = 5x
-19 + 5x + 3x2 = 31 + 3x + -3x2 + -31 + -3x + 3x2

Reorder the terms:
-19 + 5x + 3x2 = 31 + -31 + 3x + -3x + -3x2 + 3x2

Combine like terms: 31 + -31 = 0
-19 + 5x + 3x2 = 0 + 3x + -3x + -3x2 + 3x2
-19 + 5x + 3x2 = 3x + -3x + -3x2 + 3x2

Combine like terms: 3x + -3x = 0
-19 + 5x + 3x2 = 0 + -3x2 + 3x2
-19 + 5x + 3x2 = -3x2 + 3x2

Combine like terms: -3x2 + 3x2 = 0
-19 + 5x + 3x2 = 0

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

Divide each side by '3'.
-6.333333333 + 1.666666667x + x2 = 0

Move the constant term to the right:

Add '6.333333333' to each side of the equation.
-6.333333333 + 1.666666667x + 6.333333333 + x2 = 0 + 6.333333333

Reorder the terms:
-6.333333333 + 6.333333333 + 1.666666667x + x2 = 0 + 6.333333333

Combine like terms: -6.333333333 + 6.333333333 = 0.000000000
0.000000000 + 1.666666667x + x2 = 0 + 6.333333333
1.666666667x + x2 = 0 + 6.333333333

Combine like terms: 0 + 6.333333333 = 6.333333333
1.666666667x + x2 = 6.333333333

The x term is 1.666666667x.  Take half its coefficient (0.8333333335).
Square it (0.6944444447) and add it to both sides.

Add '0.6944444447' to each side of the equation.
1.666666667x + 0.6944444447 + x2 = 6.333333333 + 0.6944444447

Reorder the terms:
0.6944444447 + 1.666666667x + x2 = 6.333333333 + 0.6944444447

Combine like terms: 6.333333333 + 0.6944444447 = 7.0277777777
0.6944444447 + 1.666666667x + x2 = 7.0277777777

Factor a perfect square on the left side:
(x + 0.8333333335)(x + 0.8333333335) = 7.0277777777

Calculate the square root of the right side: 2.65099562

Break this problem into two subproblems by setting 
(x + 0.8333333335) equal to 2.65099562 and -2.65099562.

Subproblem 1

x + 0.8333333335 = 2.65099562 Simplifying x + 0.8333333335 = 2.65099562 Reorder the terms: 0.8333333335 + x = 2.65099562 Solving 0.8333333335 + x = 2.65099562 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.8333333335' to each side of the equation. 0.8333333335 + -0.8333333335 + x = 2.65099562 + -0.8333333335 Combine like terms: 0.8333333335 + -0.8333333335 = 0.0000000000 0.0000000000 + x = 2.65099562 + -0.8333333335 x = 2.65099562 + -0.8333333335 Combine like terms: 2.65099562 + -0.8333333335 = 1.8176622865 x = 1.8176622865 Simplifying x = 1.8176622865

Subproblem 2

x + 0.8333333335 = -2.65099562 Simplifying x + 0.8333333335 = -2.65099562 Reorder the terms: 0.8333333335 + x = -2.65099562 Solving 0.8333333335 + x = -2.65099562 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.8333333335' to each side of the equation. 0.8333333335 + -0.8333333335 + x = -2.65099562 + -0.8333333335 Combine like terms: 0.8333333335 + -0.8333333335 = 0.0000000000 0.0000000000 + x = -2.65099562 + -0.8333333335 x = -2.65099562 + -0.8333333335 Combine like terms: -2.65099562 + -0.8333333335 = -3.4843289535 x = -3.4843289535 Simplifying x = -3.4843289535

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.8176622865, -3.4843289535}

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