10x^2+14x=3

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Solution for 10x^2+14x=3 equation:


Simplifying
10x2 + 14x = 3

Reorder the terms:
14x + 10x2 = 3

Solving
14x + 10x2 = 3

Solving for variable 'x'.

Reorder the terms:
-3 + 14x + 10x2 = 3 + -3

Combine like terms: 3 + -3 = 0
-3 + 14x + 10x2 = 0

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

Divide each side by '10'.
-0.3 + 1.4x + x2 = 0

Move the constant term to the right:

Add '0.3' to each side of the equation.
-0.3 + 1.4x + 0.3 + x2 = 0 + 0.3

Reorder the terms:
-0.3 + 0.3 + 1.4x + x2 = 0 + 0.3

Combine like terms: -0.3 + 0.3 = 0.0
0.0 + 1.4x + x2 = 0 + 0.3
1.4x + x2 = 0 + 0.3

Combine like terms: 0 + 0.3 = 0.3
1.4x + x2 = 0.3

The x term is 1.4x.  Take half its coefficient (0.7).
Square it (0.49) and add it to both sides.

Add '0.49' to each side of the equation.
1.4x + 0.49 + x2 = 0.3 + 0.49

Reorder the terms:
0.49 + 1.4x + x2 = 0.3 + 0.49

Combine like terms: 0.3 + 0.49 = 0.79
0.49 + 1.4x + x2 = 0.79

Factor a perfect square on the left side:
(x + 0.7)(x + 0.7) = 0.79

Calculate the square root of the right side: 0.888819442

Break this problem into two subproblems by setting 
(x + 0.7) equal to 0.888819442 and -0.888819442.

Subproblem 1

x + 0.7 = 0.888819442 Simplifying x + 0.7 = 0.888819442 Reorder the terms: 0.7 + x = 0.888819442 Solving 0.7 + x = 0.888819442 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.7' to each side of the equation. 0.7 + -0.7 + x = 0.888819442 + -0.7 Combine like terms: 0.7 + -0.7 = 0.0 0.0 + x = 0.888819442 + -0.7 x = 0.888819442 + -0.7 Combine like terms: 0.888819442 + -0.7 = 0.188819442 x = 0.188819442 Simplifying x = 0.188819442

Subproblem 2

x + 0.7 = -0.888819442 Simplifying x + 0.7 = -0.888819442 Reorder the terms: 0.7 + x = -0.888819442 Solving 0.7 + x = -0.888819442 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.7' to each side of the equation. 0.7 + -0.7 + x = -0.888819442 + -0.7 Combine like terms: 0.7 + -0.7 = 0.0 0.0 + x = -0.888819442 + -0.7 x = -0.888819442 + -0.7 Combine like terms: -0.888819442 + -0.7 = -1.588819442 x = -1.588819442 Simplifying x = -1.588819442

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.188819442, -1.588819442}

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