6x^2-17x+13=20x^2-30

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Solution for 6x^2-17x+13=20x^2-30 equation:


Simplifying
6x2 + -17x + 13 = 20x2 + -30

Reorder the terms:
13 + -17x + 6x2 = 20x2 + -30

Reorder the terms:
13 + -17x + 6x2 = -30 + 20x2

Solving
13 + -17x + 6x2 = -30 + 20x2

Solving for variable 'x'.

Reorder the terms:
13 + 30 + -17x + 6x2 + -20x2 = -30 + 20x2 + 30 + -20x2

Combine like terms: 13 + 30 = 43
43 + -17x + 6x2 + -20x2 = -30 + 20x2 + 30 + -20x2

Combine like terms: 6x2 + -20x2 = -14x2
43 + -17x + -14x2 = -30 + 20x2 + 30 + -20x2

Reorder the terms:
43 + -17x + -14x2 = -30 + 30 + 20x2 + -20x2

Combine like terms: -30 + 30 = 0
43 + -17x + -14x2 = 0 + 20x2 + -20x2
43 + -17x + -14x2 = 20x2 + -20x2

Combine like terms: 20x2 + -20x2 = 0
43 + -17x + -14x2 = 0

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

Divide each side by '-14'.
-3.071428571 + 1.214285714x + x2 = 0

Move the constant term to the right:

Add '3.071428571' to each side of the equation.
-3.071428571 + 1.214285714x + 3.071428571 + x2 = 0 + 3.071428571

Reorder the terms:
-3.071428571 + 3.071428571 + 1.214285714x + x2 = 0 + 3.071428571

Combine like terms: -3.071428571 + 3.071428571 = 0.000000000
0.000000000 + 1.214285714x + x2 = 0 + 3.071428571
1.214285714x + x2 = 0 + 3.071428571

Combine like terms: 0 + 3.071428571 = 3.071428571
1.214285714x + x2 = 3.071428571

The x term is 1.214285714x.  Take half its coefficient (0.607142857).
Square it (0.3686224488) and add it to both sides.

Add '0.3686224488' to each side of the equation.
1.214285714x + 0.3686224488 + x2 = 3.071428571 + 0.3686224488

Reorder the terms:
0.3686224488 + 1.214285714x + x2 = 3.071428571 + 0.3686224488

Combine like terms: 3.071428571 + 0.3686224488 = 3.4400510198
0.3686224488 + 1.214285714x + x2 = 3.4400510198

Factor a perfect square on the left side:
(x + 0.607142857)(x + 0.607142857) = 3.4400510198

Calculate the square root of the right side: 1.854737453

Break this problem into two subproblems by setting 
(x + 0.607142857) equal to 1.854737453 and -1.854737453.

Subproblem 1

x + 0.607142857 = 1.854737453 Simplifying x + 0.607142857 = 1.854737453 Reorder the terms: 0.607142857 + x = 1.854737453 Solving 0.607142857 + x = 1.854737453 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.607142857' to each side of the equation. 0.607142857 + -0.607142857 + x = 1.854737453 + -0.607142857 Combine like terms: 0.607142857 + -0.607142857 = 0.000000000 0.000000000 + x = 1.854737453 + -0.607142857 x = 1.854737453 + -0.607142857 Combine like terms: 1.854737453 + -0.607142857 = 1.247594596 x = 1.247594596 Simplifying x = 1.247594596

Subproblem 2

x + 0.607142857 = -1.854737453 Simplifying x + 0.607142857 = -1.854737453 Reorder the terms: 0.607142857 + x = -1.854737453 Solving 0.607142857 + x = -1.854737453 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.607142857' to each side of the equation. 0.607142857 + -0.607142857 + x = -1.854737453 + -0.607142857 Combine like terms: 0.607142857 + -0.607142857 = 0.000000000 0.000000000 + x = -1.854737453 + -0.607142857 x = -1.854737453 + -0.607142857 Combine like terms: -1.854737453 + -0.607142857 = -2.46188031 x = -2.46188031 Simplifying x = -2.46188031

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.247594596, -2.46188031}

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