4.7x^2+6.3x-5.9=0

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Solution for 4.7x^2+6.3x-5.9=0 equation:


Simplifying
4.7x2 + 6.3x + -5.9 = 0

Reorder the terms:
-5.9 + 6.3x + 4.7x2 = 0

Solving
-5.9 + 6.3x + 4.7x2 = 0

Solving for variable 'x'.

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

Divide each side by '4.7'.
-1.255319149 + 1.340425532x + x2 = 0

Move the constant term to the right:

Add '1.255319149' to each side of the equation.
-1.255319149 + 1.340425532x + 1.255319149 + x2 = 0 + 1.255319149

Reorder the terms:
-1.255319149 + 1.255319149 + 1.340425532x + x2 = 0 + 1.255319149

Combine like terms: -1.255319149 + 1.255319149 = 0.000000000
0.000000000 + 1.340425532x + x2 = 0 + 1.255319149
1.340425532x + x2 = 0 + 1.255319149

Combine like terms: 0 + 1.255319149 = 1.255319149
1.340425532x + x2 = 1.255319149

The x term is 1.340425532x.  Take half its coefficient (0.670212766).
Square it (0.4491851517) and add it to both sides.

Add '0.4491851517' to each side of the equation.
1.340425532x + 0.4491851517 + x2 = 1.255319149 + 0.4491851517

Reorder the terms:
0.4491851517 + 1.340425532x + x2 = 1.255319149 + 0.4491851517

Combine like terms: 1.255319149 + 0.4491851517 = 1.7045043007
0.4491851517 + 1.340425532x + x2 = 1.7045043007

Factor a perfect square on the left side:
(x + 0.670212766)(x + 0.670212766) = 1.7045043007

Calculate the square root of the right side: 1.305566659

Break this problem into two subproblems by setting 
(x + 0.670212766) equal to 1.305566659 and -1.305566659.

Subproblem 1

x + 0.670212766 = 1.305566659 Simplifying x + 0.670212766 = 1.305566659 Reorder the terms: 0.670212766 + x = 1.305566659 Solving 0.670212766 + x = 1.305566659 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.670212766' to each side of the equation. 0.670212766 + -0.670212766 + x = 1.305566659 + -0.670212766 Combine like terms: 0.670212766 + -0.670212766 = 0.000000000 0.000000000 + x = 1.305566659 + -0.670212766 x = 1.305566659 + -0.670212766 Combine like terms: 1.305566659 + -0.670212766 = 0.635353893 x = 0.635353893 Simplifying x = 0.635353893

Subproblem 2

x + 0.670212766 = -1.305566659 Simplifying x + 0.670212766 = -1.305566659 Reorder the terms: 0.670212766 + x = -1.305566659 Solving 0.670212766 + x = -1.305566659 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.670212766' to each side of the equation. 0.670212766 + -0.670212766 + x = -1.305566659 + -0.670212766 Combine like terms: 0.670212766 + -0.670212766 = 0.000000000 0.000000000 + x = -1.305566659 + -0.670212766 x = -1.305566659 + -0.670212766 Combine like terms: -1.305566659 + -0.670212766 = -1.975779425 x = -1.975779425 Simplifying x = -1.975779425

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.635353893, -1.975779425}

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