20x^2+52x+34=15

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Solution for 20x^2+52x+34=15 equation:


Simplifying
20x2 + 52x + 34 = 15

Reorder the terms:
34 + 52x + 20x2 = 15

Solving
34 + 52x + 20x2 = 15

Solving for variable 'x'.

Reorder the terms:
34 + -15 + 52x + 20x2 = 15 + -15

Combine like terms: 34 + -15 = 19
19 + 52x + 20x2 = 15 + -15

Combine like terms: 15 + -15 = 0
19 + 52x + 20x2 = 0

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

Divide each side by '20'.
0.95 + 2.6x + x2 = 0

Move the constant term to the right:

Add '-0.95' to each side of the equation.
0.95 + 2.6x + -0.95 + x2 = 0 + -0.95

Reorder the terms:
0.95 + -0.95 + 2.6x + x2 = 0 + -0.95

Combine like terms: 0.95 + -0.95 = 0.00
0.00 + 2.6x + x2 = 0 + -0.95
2.6x + x2 = 0 + -0.95

Combine like terms: 0 + -0.95 = -0.95
2.6x + x2 = -0.95

The x term is 2.6x.  Take half its coefficient (1.3).
Square it (1.69) and add it to both sides.

Add '1.69' to each side of the equation.
2.6x + 1.69 + x2 = -0.95 + 1.69

Reorder the terms:
1.69 + 2.6x + x2 = -0.95 + 1.69

Combine like terms: -0.95 + 1.69 = 0.74
1.69 + 2.6x + x2 = 0.74

Factor a perfect square on the left side:
(x + 1.3)(x + 1.3) = 0.74

Calculate the square root of the right side: 0.860232527

Break this problem into two subproblems by setting 
(x + 1.3) equal to 0.860232527 and -0.860232527.

Subproblem 1

x + 1.3 = 0.860232527 Simplifying x + 1.3 = 0.860232527 Reorder the terms: 1.3 + x = 0.860232527 Solving 1.3 + x = 0.860232527 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.3' to each side of the equation. 1.3 + -1.3 + x = 0.860232527 + -1.3 Combine like terms: 1.3 + -1.3 = 0.0 0.0 + x = 0.860232527 + -1.3 x = 0.860232527 + -1.3 Combine like terms: 0.860232527 + -1.3 = -0.439767473 x = -0.439767473 Simplifying x = -0.439767473

Subproblem 2

x + 1.3 = -0.860232527 Simplifying x + 1.3 = -0.860232527 Reorder the terms: 1.3 + x = -0.860232527 Solving 1.3 + x = -0.860232527 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.3' to each side of the equation. 1.3 + -1.3 + x = -0.860232527 + -1.3 Combine like terms: 1.3 + -1.3 = 0.0 0.0 + x = -0.860232527 + -1.3 x = -0.860232527 + -1.3 Combine like terms: -0.860232527 + -1.3 = -2.160232527 x = -2.160232527 Simplifying x = -2.160232527

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.439767473, -2.160232527}

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