3x^2-11.2x+2.7=0

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Solution for 3x^2-11.2x+2.7=0 equation:


Simplifying
3x2 + -11.2x + 2.7 = 0

Reorder the terms:
2.7 + -11.2x + 3x2 = 0

Solving
2.7 + -11.2x + 3x2 = 0

Solving for variable 'x'.

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

Divide each side by '3'.
0.9 + -3.733333333x + x2 = 0

Move the constant term to the right:

Add '-0.9' to each side of the equation.
0.9 + -3.733333333x + -0.9 + x2 = 0 + -0.9

Reorder the terms:
0.9 + -0.9 + -3.733333333x + x2 = 0 + -0.9

Combine like terms: 0.9 + -0.9 = 0.0
0.0 + -3.733333333x + x2 = 0 + -0.9
-3.733333333x + x2 = 0 + -0.9

Combine like terms: 0 + -0.9 = -0.9
-3.733333333x + x2 = -0.9

The x term is -3.733333333x.  Take half its coefficient (-1.866666667).
Square it (3.484444446) and add it to both sides.

Add '3.484444446' to each side of the equation.
-3.733333333x + 3.484444446 + x2 = -0.9 + 3.484444446

Reorder the terms:
3.484444446 + -3.733333333x + x2 = -0.9 + 3.484444446

Combine like terms: -0.9 + 3.484444446 = 2.584444446
3.484444446 + -3.733333333x + x2 = 2.584444446

Factor a perfect square on the left side:
(x + -1.866666667)(x + -1.866666667) = 2.584444446

Calculate the square root of the right side: 1.607620741

Break this problem into two subproblems by setting 
(x + -1.866666667) equal to 1.607620741 and -1.607620741.

Subproblem 1

x + -1.866666667 = 1.607620741 Simplifying x + -1.866666667 = 1.607620741 Reorder the terms: -1.866666667 + x = 1.607620741 Solving -1.866666667 + x = 1.607620741 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.866666667' to each side of the equation. -1.866666667 + 1.866666667 + x = 1.607620741 + 1.866666667 Combine like terms: -1.866666667 + 1.866666667 = 0.000000000 0.000000000 + x = 1.607620741 + 1.866666667 x = 1.607620741 + 1.866666667 Combine like terms: 1.607620741 + 1.866666667 = 3.474287408 x = 3.474287408 Simplifying x = 3.474287408

Subproblem 2

x + -1.866666667 = -1.607620741 Simplifying x + -1.866666667 = -1.607620741 Reorder the terms: -1.866666667 + x = -1.607620741 Solving -1.866666667 + x = -1.607620741 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.866666667' to each side of the equation. -1.866666667 + 1.866666667 + x = -1.607620741 + 1.866666667 Combine like terms: -1.866666667 + 1.866666667 = 0.000000000 0.000000000 + x = -1.607620741 + 1.866666667 x = -1.607620741 + 1.866666667 Combine like terms: -1.607620741 + 1.866666667 = 0.259045926 x = 0.259045926 Simplifying x = 0.259045926

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.474287408, 0.259045926}

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