14x^2+12x=65

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Solution for 14x^2+12x=65 equation:


Simplifying
14x2 + 12x = 65

Reorder the terms:
12x + 14x2 = 65

Solving
12x + 14x2 = 65

Solving for variable 'x'.

Reorder the terms:
-65 + 12x + 14x2 = 65 + -65

Combine like terms: 65 + -65 = 0
-65 + 12x + 14x2 = 0

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

Divide each side by '14'.
-4.642857143 + 0.8571428571x + x2 = 0

Move the constant term to the right:

Add '4.642857143' to each side of the equation.
-4.642857143 + 0.8571428571x + 4.642857143 + x2 = 0 + 4.642857143

Reorder the terms:
-4.642857143 + 4.642857143 + 0.8571428571x + x2 = 0 + 4.642857143

Combine like terms: -4.642857143 + 4.642857143 = 0.000000000
0.000000000 + 0.8571428571x + x2 = 0 + 4.642857143
0.8571428571x + x2 = 0 + 4.642857143

Combine like terms: 0 + 4.642857143 = 4.642857143
0.8571428571x + x2 = 4.642857143

The x term is 0.8571428571x.  Take half its coefficient (0.4285714286).
Square it (0.1836734694) and add it to both sides.

Add '0.1836734694' to each side of the equation.
0.8571428571x + 0.1836734694 + x2 = 4.642857143 + 0.1836734694

Reorder the terms:
0.1836734694 + 0.8571428571x + x2 = 4.642857143 + 0.1836734694

Combine like terms: 4.642857143 + 0.1836734694 = 4.8265306124
0.1836734694 + 0.8571428571x + x2 = 4.8265306124

Factor a perfect square on the left side:
(x + 0.4285714286)(x + 0.4285714286) = 4.8265306124

Calculate the square root of the right side: 2.196936643

Break this problem into two subproblems by setting 
(x + 0.4285714286) equal to 2.196936643 and -2.196936643.

Subproblem 1

x + 0.4285714286 = 2.196936643 Simplifying x + 0.4285714286 = 2.196936643 Reorder the terms: 0.4285714286 + x = 2.196936643 Solving 0.4285714286 + x = 2.196936643 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.4285714286' to each side of the equation. 0.4285714286 + -0.4285714286 + x = 2.196936643 + -0.4285714286 Combine like terms: 0.4285714286 + -0.4285714286 = 0.0000000000 0.0000000000 + x = 2.196936643 + -0.4285714286 x = 2.196936643 + -0.4285714286 Combine like terms: 2.196936643 + -0.4285714286 = 1.7683652144 x = 1.7683652144 Simplifying x = 1.7683652144

Subproblem 2

x + 0.4285714286 = -2.196936643 Simplifying x + 0.4285714286 = -2.196936643 Reorder the terms: 0.4285714286 + x = -2.196936643 Solving 0.4285714286 + x = -2.196936643 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.4285714286' to each side of the equation. 0.4285714286 + -0.4285714286 + x = -2.196936643 + -0.4285714286 Combine like terms: 0.4285714286 + -0.4285714286 = 0.0000000000 0.0000000000 + x = -2.196936643 + -0.4285714286 x = -2.196936643 + -0.4285714286 Combine like terms: -2.196936643 + -0.4285714286 = -2.6255080716 x = -2.6255080716 Simplifying x = -2.6255080716

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.7683652144, -2.6255080716}

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