=3x^2-11x+4

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Solution for =3x^2-11x+4 equation:


Simplifying
0 = 3x2 + -11x + 4

Reorder the terms:
0 = 4 + -11x + 3x2

Solving
0 = 4 + -11x + 3x2

Solving for variable 'x'.

Combine like terms: 0 + -4 = -4
-4 + 11x + -3x2 = 4 + -11x + 3x2 + -4 + 11x + -3x2

Reorder the terms:
-4 + 11x + -3x2 = 4 + -4 + -11x + 11x + 3x2 + -3x2

Combine like terms: 4 + -4 = 0
-4 + 11x + -3x2 = 0 + -11x + 11x + 3x2 + -3x2
-4 + 11x + -3x2 = -11x + 11x + 3x2 + -3x2

Combine like terms: -11x + 11x = 0
-4 + 11x + -3x2 = 0 + 3x2 + -3x2
-4 + 11x + -3x2 = 3x2 + -3x2

Combine like terms: 3x2 + -3x2 = 0
-4 + 11x + -3x2 = 0

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

Divide each side by '-3'.
1.333333333 + -3.666666667x + x2 = 0

Move the constant term to the right:

Add '-1.333333333' to each side of the equation.
1.333333333 + -3.666666667x + -1.333333333 + x2 = 0 + -1.333333333

Reorder the terms:
1.333333333 + -1.333333333 + -3.666666667x + x2 = 0 + -1.333333333

Combine like terms: 1.333333333 + -1.333333333 = 0.000000000
0.000000000 + -3.666666667x + x2 = 0 + -1.333333333
-3.666666667x + x2 = 0 + -1.333333333

Combine like terms: 0 + -1.333333333 = -1.333333333
-3.666666667x + x2 = -1.333333333

The x term is -3.666666667x.  Take half its coefficient (-1.833333334).
Square it (3.361111114) and add it to both sides.

Add '3.361111114' to each side of the equation.
-3.666666667x + 3.361111114 + x2 = -1.333333333 + 3.361111114

Reorder the terms:
3.361111114 + -3.666666667x + x2 = -1.333333333 + 3.361111114

Combine like terms: -1.333333333 + 3.361111114 = 2.027777781
3.361111114 + -3.666666667x + x2 = 2.027777781

Factor a perfect square on the left side:
(x + -1.833333334)(x + -1.833333334) = 2.027777781

Calculate the square root of the right side: 1.424000625

Break this problem into two subproblems by setting 
(x + -1.833333334) equal to 1.424000625 and -1.424000625.

Subproblem 1

x + -1.833333334 = 1.424000625 Simplifying x + -1.833333334 = 1.424000625 Reorder the terms: -1.833333334 + x = 1.424000625 Solving -1.833333334 + x = 1.424000625 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.833333334' to each side of the equation. -1.833333334 + 1.833333334 + x = 1.424000625 + 1.833333334 Combine like terms: -1.833333334 + 1.833333334 = 0.000000000 0.000000000 + x = 1.424000625 + 1.833333334 x = 1.424000625 + 1.833333334 Combine like terms: 1.424000625 + 1.833333334 = 3.257333959 x = 3.257333959 Simplifying x = 3.257333959

Subproblem 2

x + -1.833333334 = -1.424000625 Simplifying x + -1.833333334 = -1.424000625 Reorder the terms: -1.833333334 + x = -1.424000625 Solving -1.833333334 + x = -1.424000625 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.833333334' to each side of the equation. -1.833333334 + 1.833333334 + x = -1.424000625 + 1.833333334 Combine like terms: -1.833333334 + 1.833333334 = 0.000000000 0.000000000 + x = -1.424000625 + 1.833333334 x = -1.424000625 + 1.833333334 Combine like terms: -1.424000625 + 1.833333334 = 0.409332709 x = 0.409332709 Simplifying x = 0.409332709

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.257333959, 0.409332709}

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