21x^2-24x+2=0

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Solution for 21x^2-24x+2=0 equation:


Simplifying
21x2 + -24x + 2 = 0

Reorder the terms:
2 + -24x + 21x2 = 0

Solving
2 + -24x + 21x2 = 0

Solving for variable 'x'.

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

Divide each side by '21'.
0.09523809524 + -1.142857143x + x2 = 0

Move the constant term to the right:

Add '-0.09523809524' to each side of the equation.
0.09523809524 + -1.142857143x + -0.09523809524 + x2 = 0 + -0.09523809524

Reorder the terms:
0.09523809524 + -0.09523809524 + -1.142857143x + x2 = 0 + -0.09523809524

Combine like terms: 0.09523809524 + -0.09523809524 = 0.00000000000
0.00000000000 + -1.142857143x + x2 = 0 + -0.09523809524
-1.142857143x + x2 = 0 + -0.09523809524

Combine like terms: 0 + -0.09523809524 = -0.09523809524
-1.142857143x + x2 = -0.09523809524

The x term is -1.142857143x.  Take half its coefficient (-0.5714285715).
Square it (0.3265306123) and add it to both sides.

Add '0.3265306123' to each side of the equation.
-1.142857143x + 0.3265306123 + x2 = -0.09523809524 + 0.3265306123

Reorder the terms:
0.3265306123 + -1.142857143x + x2 = -0.09523809524 + 0.3265306123

Combine like terms: -0.09523809524 + 0.3265306123 = 0.23129251706
0.3265306123 + -1.142857143x + x2 = 0.23129251706

Factor a perfect square on the left side:
(x + -0.5714285715)(x + -0.5714285715) = 0.23129251706

Calculate the square root of the right side: 0.480928807

Break this problem into two subproblems by setting 
(x + -0.5714285715) equal to 0.480928807 and -0.480928807.

Subproblem 1

x + -0.5714285715 = 0.480928807 Simplifying x + -0.5714285715 = 0.480928807 Reorder the terms: -0.5714285715 + x = 0.480928807 Solving -0.5714285715 + x = 0.480928807 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5714285715' to each side of the equation. -0.5714285715 + 0.5714285715 + x = 0.480928807 + 0.5714285715 Combine like terms: -0.5714285715 + 0.5714285715 = 0.0000000000 0.0000000000 + x = 0.480928807 + 0.5714285715 x = 0.480928807 + 0.5714285715 Combine like terms: 0.480928807 + 0.5714285715 = 1.0523573785 x = 1.0523573785 Simplifying x = 1.0523573785

Subproblem 2

x + -0.5714285715 = -0.480928807 Simplifying x + -0.5714285715 = -0.480928807 Reorder the terms: -0.5714285715 + x = -0.480928807 Solving -0.5714285715 + x = -0.480928807 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5714285715' to each side of the equation. -0.5714285715 + 0.5714285715 + x = -0.480928807 + 0.5714285715 Combine like terms: -0.5714285715 + 0.5714285715 = 0.0000000000 0.0000000000 + x = -0.480928807 + 0.5714285715 x = -0.480928807 + 0.5714285715 Combine like terms: -0.480928807 + 0.5714285715 = 0.0904997645 x = 0.0904997645 Simplifying x = 0.0904997645

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.0523573785, 0.0904997645}

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