20x^2+29x-5=56

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Solution for 20x^2+29x-5=56 equation:


Simplifying
20x2 + 29x + -5 = 56

Reorder the terms:
-5 + 29x + 20x2 = 56

Solving
-5 + 29x + 20x2 = 56

Solving for variable 'x'.

Reorder the terms:
-5 + -56 + 29x + 20x2 = 56 + -56

Combine like terms: -5 + -56 = -61
-61 + 29x + 20x2 = 56 + -56

Combine like terms: 56 + -56 = 0
-61 + 29x + 20x2 = 0

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

Divide each side by '20'.
-3.05 + 1.45x + x2 = 0

Move the constant term to the right:

Add '3.05' to each side of the equation.
-3.05 + 1.45x + 3.05 + x2 = 0 + 3.05

Reorder the terms:
-3.05 + 3.05 + 1.45x + x2 = 0 + 3.05

Combine like terms: -3.05 + 3.05 = 0.00
0.00 + 1.45x + x2 = 0 + 3.05
1.45x + x2 = 0 + 3.05

Combine like terms: 0 + 3.05 = 3.05
1.45x + x2 = 3.05

The x term is 1.45x.  Take half its coefficient (0.725).
Square it (0.525625) and add it to both sides.

Add '0.525625' to each side of the equation.
1.45x + 0.525625 + x2 = 3.05 + 0.525625

Reorder the terms:
0.525625 + 1.45x + x2 = 3.05 + 0.525625

Combine like terms: 3.05 + 0.525625 = 3.575625
0.525625 + 1.45x + x2 = 3.575625

Factor a perfect square on the left side:
(x + 0.725)(x + 0.725) = 3.575625

Calculate the square root of the right side: 1.89093231

Break this problem into two subproblems by setting 
(x + 0.725) equal to 1.89093231 and -1.89093231.

Subproblem 1

x + 0.725 = 1.89093231 Simplifying x + 0.725 = 1.89093231 Reorder the terms: 0.725 + x = 1.89093231 Solving 0.725 + x = 1.89093231 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.725' to each side of the equation. 0.725 + -0.725 + x = 1.89093231 + -0.725 Combine like terms: 0.725 + -0.725 = 0.000 0.000 + x = 1.89093231 + -0.725 x = 1.89093231 + -0.725 Combine like terms: 1.89093231 + -0.725 = 1.16593231 x = 1.16593231 Simplifying x = 1.16593231

Subproblem 2

x + 0.725 = -1.89093231 Simplifying x + 0.725 = -1.89093231 Reorder the terms: 0.725 + x = -1.89093231 Solving 0.725 + x = -1.89093231 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.725' to each side of the equation. 0.725 + -0.725 + x = -1.89093231 + -0.725 Combine like terms: 0.725 + -0.725 = 0.000 0.000 + x = -1.89093231 + -0.725 x = -1.89093231 + -0.725 Combine like terms: -1.89093231 + -0.725 = -2.61593231 x = -2.61593231 Simplifying x = -2.61593231

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.16593231, -2.61593231}

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