3.2(x+4)+2x^2+1.7(x-3)=27

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Solution for 3.2(x+4)+2x^2+1.7(x-3)=27 equation:


Simplifying
3.2(x + 4) + 2x2 + 1.7(x + -3) = 27

Reorder the terms:
3.2(4 + x) + 2x2 + 1.7(x + -3) = 27
(4 * 3.2 + x * 3.2) + 2x2 + 1.7(x + -3) = 27
(12.8 + 3.2x) + 2x2 + 1.7(x + -3) = 27

Reorder the terms:
12.8 + 3.2x + 2x2 + 1.7(-3 + x) = 27
12.8 + 3.2x + 2x2 + (-3 * 1.7 + x * 1.7) = 27
12.8 + 3.2x + 2x2 + (-5.1 + 1.7x) = 27

Reorder the terms:
12.8 + -5.1 + 3.2x + 1.7x + 2x2 = 27

Combine like terms: 12.8 + -5.1 = 7.7
7.7 + 3.2x + 1.7x + 2x2 = 27

Combine like terms: 3.2x + 1.7x = 4.9x
7.7 + 4.9x + 2x2 = 27

Solving
7.7 + 4.9x + 2x2 = 27

Solving for variable 'x'.

Reorder the terms:
7.7 + -27 + 4.9x + 2x2 = 27 + -27

Combine like terms: 7.7 + -27 = -19.3
-19.3 + 4.9x + 2x2 = 27 + -27

Combine like terms: 27 + -27 = 0
-19.3 + 4.9x + 2x2 = 0

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

Divide each side by '2'.
-9.65 + 2.45x + x2 = 0

Move the constant term to the right:

Add '9.65' to each side of the equation.
-9.65 + 2.45x + 9.65 + x2 = 0 + 9.65

Reorder the terms:
-9.65 + 9.65 + 2.45x + x2 = 0 + 9.65

Combine like terms: -9.65 + 9.65 = 0.00
0.00 + 2.45x + x2 = 0 + 9.65
2.45x + x2 = 0 + 9.65

Combine like terms: 0 + 9.65 = 9.65
2.45x + x2 = 9.65

The x term is 2.45x.  Take half its coefficient (1.225).
Square it (1.500625) and add it to both sides.

Add '1.500625' to each side of the equation.
2.45x + 1.500625 + x2 = 9.65 + 1.500625

Reorder the terms:
1.500625 + 2.45x + x2 = 9.65 + 1.500625

Combine like terms: 9.65 + 1.500625 = 11.150625
1.500625 + 2.45x + x2 = 11.150625

Factor a perfect square on the left side:
(x + 1.225)(x + 1.225) = 11.150625

Calculate the square root of the right side: 3.339255156

Break this problem into two subproblems by setting 
(x + 1.225) equal to 3.339255156 and -3.339255156.

Subproblem 1

x + 1.225 = 3.339255156 Simplifying x + 1.225 = 3.339255156 Reorder the terms: 1.225 + x = 3.339255156 Solving 1.225 + x = 3.339255156 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.225' to each side of the equation. 1.225 + -1.225 + x = 3.339255156 + -1.225 Combine like terms: 1.225 + -1.225 = 0.000 0.000 + x = 3.339255156 + -1.225 x = 3.339255156 + -1.225 Combine like terms: 3.339255156 + -1.225 = 2.114255156 x = 2.114255156 Simplifying x = 2.114255156

Subproblem 2

x + 1.225 = -3.339255156 Simplifying x + 1.225 = -3.339255156 Reorder the terms: 1.225 + x = -3.339255156 Solving 1.225 + x = -3.339255156 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.225' to each side of the equation. 1.225 + -1.225 + x = -3.339255156 + -1.225 Combine like terms: 1.225 + -1.225 = 0.000 0.000 + x = -3.339255156 + -1.225 x = -3.339255156 + -1.225 Combine like terms: -3.339255156 + -1.225 = -4.564255156 x = -4.564255156 Simplifying x = -4.564255156

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.114255156, -4.564255156}

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