3x*(x+4)=4x+1*(x+2)

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


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

Reorder the terms:
3x(4 + x) = 4x + 1(x + 2)
(4 * 3x + x * 3x) = 4x + 1(x + 2)
(12x + 3x2) = 4x + 1(x + 2)

Reorder the terms:
12x + 3x2 = 4x + 1(2 + x)
12x + 3x2 = 4x + (2 * 1 + x * 1)
12x + 3x2 = 4x + (2 + 1x)

Reorder the terms:
12x + 3x2 = 2 + 4x + 1x

Combine like terms: 4x + 1x = 5x
12x + 3x2 = 2 + 5x

Solving
12x + 3x2 = 2 + 5x

Solving for variable 'x'.

Reorder the terms:
-2 + 12x + -5x + 3x2 = 2 + 5x + -2 + -5x

Combine like terms: 12x + -5x = 7x
-2 + 7x + 3x2 = 2 + 5x + -2 + -5x

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

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

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

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

Divide each side by '3'.
-0.6666666667 + 2.333333333x + x2 = 0

Move the constant term to the right:

Add '0.6666666667' to each side of the equation.
-0.6666666667 + 2.333333333x + 0.6666666667 + x2 = 0 + 0.6666666667

Reorder the terms:
-0.6666666667 + 0.6666666667 + 2.333333333x + x2 = 0 + 0.6666666667

Combine like terms: -0.6666666667 + 0.6666666667 = 0.0000000000
0.0000000000 + 2.333333333x + x2 = 0 + 0.6666666667
2.333333333x + x2 = 0 + 0.6666666667

Combine like terms: 0 + 0.6666666667 = 0.6666666667
2.333333333x + x2 = 0.6666666667

The x term is 2.333333333x.  Take half its coefficient (1.166666667).
Square it (1.361111112) and add it to both sides.

Add '1.361111112' to each side of the equation.
2.333333333x + 1.361111112 + x2 = 0.6666666667 + 1.361111112

Reorder the terms:
1.361111112 + 2.333333333x + x2 = 0.6666666667 + 1.361111112

Combine like terms: 0.6666666667 + 1.361111112 = 2.0277777787
1.361111112 + 2.333333333x + x2 = 2.0277777787

Factor a perfect square on the left side:
(x + 1.166666667)(x + 1.166666667) = 2.0277777787

Calculate the square root of the right side: 1.424000625

Break this problem into two subproblems by setting 
(x + 1.166666667) equal to 1.424000625 and -1.424000625.

Subproblem 1

x + 1.166666667 = 1.424000625 Simplifying x + 1.166666667 = 1.424000625 Reorder the terms: 1.166666667 + x = 1.424000625 Solving 1.166666667 + x = 1.424000625 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.166666667' to each side of the equation. 1.166666667 + -1.166666667 + x = 1.424000625 + -1.166666667 Combine like terms: 1.166666667 + -1.166666667 = 0.000000000 0.000000000 + x = 1.424000625 + -1.166666667 x = 1.424000625 + -1.166666667 Combine like terms: 1.424000625 + -1.166666667 = 0.257333958 x = 0.257333958 Simplifying x = 0.257333958

Subproblem 2

x + 1.166666667 = -1.424000625 Simplifying x + 1.166666667 = -1.424000625 Reorder the terms: 1.166666667 + x = -1.424000625 Solving 1.166666667 + x = -1.424000625 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.166666667' to each side of the equation. 1.166666667 + -1.166666667 + x = -1.424000625 + -1.166666667 Combine like terms: 1.166666667 + -1.166666667 = 0.000000000 0.000000000 + x = -1.424000625 + -1.166666667 x = -1.424000625 + -1.166666667 Combine like terms: -1.424000625 + -1.166666667 = -2.590667292 x = -2.590667292 Simplifying x = -2.590667292

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.257333958, -2.590667292}

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