6x+3x^2=1.6

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Solution for 6x+3x^2=1.6 equation:


Simplifying
6x + 3x2 = 1.6

Solving
6x + 3x2 = 1.6

Solving for variable 'x'.

Reorder the terms:
-1.6 + 6x + 3x2 = 1.6 + -1.6

Combine like terms: 1.6 + -1.6 = 0.0
-1.6 + 6x + 3x2 = 0.0

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

Divide each side by '3'.
-0.5333333333 + 2x + x2 = 0.0

Move the constant term to the right:

Add '0.5333333333' to each side of the equation.
-0.5333333333 + 2x + 0.5333333333 + x2 = 0.0 + 0.5333333333

Reorder the terms:
-0.5333333333 + 0.5333333333 + 2x + x2 = 0.0 + 0.5333333333

Combine like terms: -0.5333333333 + 0.5333333333 = 0.0000000000
0.0000000000 + 2x + x2 = 0.0 + 0.5333333333
2x + x2 = 0.0 + 0.5333333333

Combine like terms: 0.0 + 0.5333333333 = 0.5333333333
2x + x2 = 0.5333333333

The x term is 2x.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2x + 1 + x2 = 0.5333333333 + 1

Reorder the terms:
1 + 2x + x2 = 0.5333333333 + 1

Combine like terms: 0.5333333333 + 1 = 1.5333333333
1 + 2x + x2 = 1.5333333333

Factor a perfect square on the left side:
(x + 1)(x + 1) = 1.5333333333

Calculate the square root of the right side: 1.238278375

Break this problem into two subproblems by setting 
(x + 1) equal to 1.238278375 and -1.238278375.

Subproblem 1

x + 1 = 1.238278375 Simplifying x + 1 = 1.238278375 Reorder the terms: 1 + x = 1.238278375 Solving 1 + x = 1.238278375 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = 1.238278375 + -1 Combine like terms: 1 + -1 = 0 0 + x = 1.238278375 + -1 x = 1.238278375 + -1 Combine like terms: 1.238278375 + -1 = 0.238278375 x = 0.238278375 Simplifying x = 0.238278375

Subproblem 2

x + 1 = -1.238278375 Simplifying x + 1 = -1.238278375 Reorder the terms: 1 + x = -1.238278375 Solving 1 + x = -1.238278375 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = -1.238278375 + -1 Combine like terms: 1 + -1 = 0 0 + x = -1.238278375 + -1 x = -1.238278375 + -1 Combine like terms: -1.238278375 + -1 = -2.238278375 x = -2.238278375 Simplifying x = -2.238278375

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.238278375, -2.238278375}

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