5x^2+12x-14=0

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Solution for 5x^2+12x-14=0 equation:


Simplifying
5x2 + 12x + -14 = 0

Reorder the terms:
-14 + 12x + 5x2 = 0

Solving
-14 + 12x + 5x2 = 0

Solving for variable 'x'.

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

Divide each side by '5'.
-2.8 + 2.4x + x2 = 0

Move the constant term to the right:

Add '2.8' to each side of the equation.
-2.8 + 2.4x + 2.8 + x2 = 0 + 2.8

Reorder the terms:
-2.8 + 2.8 + 2.4x + x2 = 0 + 2.8

Combine like terms: -2.8 + 2.8 = 0.0
0.0 + 2.4x + x2 = 0 + 2.8
2.4x + x2 = 0 + 2.8

Combine like terms: 0 + 2.8 = 2.8
2.4x + x2 = 2.8

The x term is 2.4x.  Take half its coefficient (1.2).
Square it (1.44) and add it to both sides.

Add '1.44' to each side of the equation.
2.4x + 1.44 + x2 = 2.8 + 1.44

Reorder the terms:
1.44 + 2.4x + x2 = 2.8 + 1.44

Combine like terms: 2.8 + 1.44 = 4.24
1.44 + 2.4x + x2 = 4.24

Factor a perfect square on the left side:
(x + 1.2)(x + 1.2) = 4.24

Calculate the square root of the right side: 2.059126028

Break this problem into two subproblems by setting 
(x + 1.2) equal to 2.059126028 and -2.059126028.

Subproblem 1

x + 1.2 = 2.059126028 Simplifying x + 1.2 = 2.059126028 Reorder the terms: 1.2 + x = 2.059126028 Solving 1.2 + x = 2.059126028 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.2' to each side of the equation. 1.2 + -1.2 + x = 2.059126028 + -1.2 Combine like terms: 1.2 + -1.2 = 0.0 0.0 + x = 2.059126028 + -1.2 x = 2.059126028 + -1.2 Combine like terms: 2.059126028 + -1.2 = 0.859126028 x = 0.859126028 Simplifying x = 0.859126028

Subproblem 2

x + 1.2 = -2.059126028 Simplifying x + 1.2 = -2.059126028 Reorder the terms: 1.2 + x = -2.059126028 Solving 1.2 + x = -2.059126028 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.2' to each side of the equation. 1.2 + -1.2 + x = -2.059126028 + -1.2 Combine like terms: 1.2 + -1.2 = 0.0 0.0 + x = -2.059126028 + -1.2 x = -2.059126028 + -1.2 Combine like terms: -2.059126028 + -1.2 = -3.259126028 x = -3.259126028 Simplifying x = -3.259126028

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.859126028, -3.259126028}

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