14x^2-30x-3=0

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Solution for 14x^2-30x-3=0 equation:


Simplifying
14x2 + -30x + -3 = 0

Reorder the terms:
-3 + -30x + 14x2 = 0

Solving
-3 + -30x + 14x2 = 0

Solving for variable 'x'.

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

Divide each side by '14'.
-0.2142857143 + -2.142857143x + x2 = 0

Move the constant term to the right:

Add '0.2142857143' to each side of the equation.
-0.2142857143 + -2.142857143x + 0.2142857143 + x2 = 0 + 0.2142857143

Reorder the terms:
-0.2142857143 + 0.2142857143 + -2.142857143x + x2 = 0 + 0.2142857143

Combine like terms: -0.2142857143 + 0.2142857143 = 0.0000000000
0.0000000000 + -2.142857143x + x2 = 0 + 0.2142857143
-2.142857143x + x2 = 0 + 0.2142857143

Combine like terms: 0 + 0.2142857143 = 0.2142857143
-2.142857143x + x2 = 0.2142857143

The x term is -2.142857143x.  Take half its coefficient (-1.071428572).
Square it (1.147959185) and add it to both sides.

Add '1.147959185' to each side of the equation.
-2.142857143x + 1.147959185 + x2 = 0.2142857143 + 1.147959185

Reorder the terms:
1.147959185 + -2.142857143x + x2 = 0.2142857143 + 1.147959185

Combine like terms: 0.2142857143 + 1.147959185 = 1.3622448993
1.147959185 + -2.142857143x + x2 = 1.3622448993

Factor a perfect square on the left side:
(x + -1.071428572)(x + -1.071428572) = 1.3622448993

Calculate the square root of the right side: 1.167152475

Break this problem into two subproblems by setting 
(x + -1.071428572) equal to 1.167152475 and -1.167152475.

Subproblem 1

x + -1.071428572 = 1.167152475 Simplifying x + -1.071428572 = 1.167152475 Reorder the terms: -1.071428572 + x = 1.167152475 Solving -1.071428572 + x = 1.167152475 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.071428572' to each side of the equation. -1.071428572 + 1.071428572 + x = 1.167152475 + 1.071428572 Combine like terms: -1.071428572 + 1.071428572 = 0.000000000 0.000000000 + x = 1.167152475 + 1.071428572 x = 1.167152475 + 1.071428572 Combine like terms: 1.167152475 + 1.071428572 = 2.238581047 x = 2.238581047 Simplifying x = 2.238581047

Subproblem 2

x + -1.071428572 = -1.167152475 Simplifying x + -1.071428572 = -1.167152475 Reorder the terms: -1.071428572 + x = -1.167152475 Solving -1.071428572 + x = -1.167152475 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.071428572' to each side of the equation. -1.071428572 + 1.071428572 + x = -1.167152475 + 1.071428572 Combine like terms: -1.071428572 + 1.071428572 = 0.000000000 0.000000000 + x = -1.167152475 + 1.071428572 x = -1.167152475 + 1.071428572 Combine like terms: -1.167152475 + 1.071428572 = -0.095723903 x = -0.095723903 Simplifying x = -0.095723903

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.238581047, -0.095723903}

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