7x^2+14x-3=0

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Solution for 7x^2+14x-3=0 equation:


Simplifying
7x2 + 14x + -3 = 0

Reorder the terms:
-3 + 14x + 7x2 = 0

Solving
-3 + 14x + 7x2 = 0

Solving for variable 'x'.

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

Divide each side by '7'.
-0.4285714286 + 2x + x2 = 0

Move the constant term to the right:

Add '0.4285714286' to each side of the equation.
-0.4285714286 + 2x + 0.4285714286 + x2 = 0 + 0.4285714286

Reorder the terms:
-0.4285714286 + 0.4285714286 + 2x + x2 = 0 + 0.4285714286

Combine like terms: -0.4285714286 + 0.4285714286 = 0.0000000000
0.0000000000 + 2x + x2 = 0 + 0.4285714286
2x + x2 = 0 + 0.4285714286

Combine like terms: 0 + 0.4285714286 = 0.4285714286
2x + x2 = 0.4285714286

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 = 0.4285714286 + 1

Reorder the terms:
1 + 2x + x2 = 0.4285714286 + 1

Combine like terms: 0.4285714286 + 1 = 1.4285714286
1 + 2x + x2 = 1.4285714286

Factor a perfect square on the left side:
(x + 1)(x + 1) = 1.4285714286

Calculate the square root of the right side: 1.195228609

Break this problem into two subproblems by setting 
(x + 1) equal to 1.195228609 and -1.195228609.

Subproblem 1

x + 1 = 1.195228609 Simplifying x + 1 = 1.195228609 Reorder the terms: 1 + x = 1.195228609 Solving 1 + x = 1.195228609 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 = 1.195228609 + -1 Combine like terms: 1 + -1 = 0 0 + x = 1.195228609 + -1 x = 1.195228609 + -1 Combine like terms: 1.195228609 + -1 = 0.195228609 x = 0.195228609 Simplifying x = 0.195228609

Subproblem 2

x + 1 = -1.195228609 Simplifying x + 1 = -1.195228609 Reorder the terms: 1 + x = -1.195228609 Solving 1 + x = -1.195228609 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 = -1.195228609 + -1 Combine like terms: 1 + -1 = 0 0 + x = -1.195228609 + -1 x = -1.195228609 + -1 Combine like terms: -1.195228609 + -1 = -2.195228609 x = -2.195228609 Simplifying x = -2.195228609

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.195228609, -2.195228609}

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