2x^2-45x=5x^2-4x-30

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Solution for 2x^2-45x=5x^2-4x-30 equation:


Simplifying
2x2 + -45x = 5x2 + -4x + -30

Reorder the terms:
-45x + 2x2 = 5x2 + -4x + -30

Reorder the terms:
-45x + 2x2 = -30 + -4x + 5x2

Solving
-45x + 2x2 = -30 + -4x + 5x2

Solving for variable 'x'.

Reorder the terms:
30 + -45x + 4x + 2x2 + -5x2 = -30 + -4x + 5x2 + 30 + 4x + -5x2

Combine like terms: -45x + 4x = -41x
30 + -41x + 2x2 + -5x2 = -30 + -4x + 5x2 + 30 + 4x + -5x2

Combine like terms: 2x2 + -5x2 = -3x2
30 + -41x + -3x2 = -30 + -4x + 5x2 + 30 + 4x + -5x2

Reorder the terms:
30 + -41x + -3x2 = -30 + 30 + -4x + 4x + 5x2 + -5x2

Combine like terms: -30 + 30 = 0
30 + -41x + -3x2 = 0 + -4x + 4x + 5x2 + -5x2
30 + -41x + -3x2 = -4x + 4x + 5x2 + -5x2

Combine like terms: -4x + 4x = 0
30 + -41x + -3x2 = 0 + 5x2 + -5x2
30 + -41x + -3x2 = 5x2 + -5x2

Combine like terms: 5x2 + -5x2 = 0
30 + -41x + -3x2 = 0

Begin completing the square.  Divide all terms by
-3 the coefficient of the squared term: 

Divide each side by '-3'.
-10 + 13.66666667x + x2 = 0

Move the constant term to the right:

Add '10' to each side of the equation.
-10 + 13.66666667x + 10 + x2 = 0 + 10

Reorder the terms:
-10 + 10 + 13.66666667x + x2 = 0 + 10

Combine like terms: -10 + 10 = 0
0 + 13.66666667x + x2 = 0 + 10
13.66666667x + x2 = 0 + 10

Combine like terms: 0 + 10 = 10
13.66666667x + x2 = 10

The x term is 13.66666667x.  Take half its coefficient (6.833333335).
Square it (46.69444447) and add it to both sides.

Add '46.69444447' to each side of the equation.
13.66666667x + 46.69444447 + x2 = 10 + 46.69444447

Reorder the terms:
46.69444447 + 13.66666667x + x2 = 10 + 46.69444447

Combine like terms: 10 + 46.69444447 = 56.69444447
46.69444447 + 13.66666667x + x2 = 56.69444447

Factor a perfect square on the left side:
(x + 6.833333335)(x + 6.833333335) = 56.69444447

Calculate the square root of the right side: 7.529571334

Break this problem into two subproblems by setting 
(x + 6.833333335) equal to 7.529571334 and -7.529571334.

Subproblem 1

x + 6.833333335 = 7.529571334 Simplifying x + 6.833333335 = 7.529571334 Reorder the terms: 6.833333335 + x = 7.529571334 Solving 6.833333335 + x = 7.529571334 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6.833333335' to each side of the equation. 6.833333335 + -6.833333335 + x = 7.529571334 + -6.833333335 Combine like terms: 6.833333335 + -6.833333335 = 0.000000000 0.000000000 + x = 7.529571334 + -6.833333335 x = 7.529571334 + -6.833333335 Combine like terms: 7.529571334 + -6.833333335 = 0.696237999 x = 0.696237999 Simplifying x = 0.696237999

Subproblem 2

x + 6.833333335 = -7.529571334 Simplifying x + 6.833333335 = -7.529571334 Reorder the terms: 6.833333335 + x = -7.529571334 Solving 6.833333335 + x = -7.529571334 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6.833333335' to each side of the equation. 6.833333335 + -6.833333335 + x = -7.529571334 + -6.833333335 Combine like terms: 6.833333335 + -6.833333335 = 0.000000000 0.000000000 + x = -7.529571334 + -6.833333335 x = -7.529571334 + -6.833333335 Combine like terms: -7.529571334 + -6.833333335 = -14.362904669 x = -14.362904669 Simplifying x = -14.362904669

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.696237999, -14.362904669}

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