54x-0.3x^2=10x+15

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Solution for 54x-0.3x^2=10x+15 equation:


Simplifying
54x + -0.3x2 = 10x + 15

Reorder the terms:
54x + -0.3x2 = 15 + 10x

Solving
54x + -0.3x2 = 15 + 10x

Solving for variable 'x'.

Reorder the terms:
-15 + 54x + -10x + -0.3x2 = 15 + 10x + -15 + -10x

Combine like terms: 54x + -10x = 44x
-15 + 44x + -0.3x2 = 15 + 10x + -15 + -10x

Reorder the terms:
-15 + 44x + -0.3x2 = 15 + -15 + 10x + -10x

Combine like terms: 15 + -15 = 0
-15 + 44x + -0.3x2 = 0 + 10x + -10x
-15 + 44x + -0.3x2 = 10x + -10x

Combine like terms: 10x + -10x = 0
-15 + 44x + -0.3x2 = 0

Begin completing the square.  Divide all terms by
-0.3 the coefficient of the squared term: 

Divide each side by '-0.3'.
50 + -146.6666667x + x2 = 0

Move the constant term to the right:

Add '-50' to each side of the equation.
50 + -146.6666667x + -50 + x2 = 0 + -50

Reorder the terms:
50 + -50 + -146.6666667x + x2 = 0 + -50

Combine like terms: 50 + -50 = 0
0 + -146.6666667x + x2 = 0 + -50
-146.6666667x + x2 = 0 + -50

Combine like terms: 0 + -50 = -50
-146.6666667x + x2 = -50

The x term is -146.6666667x.  Take half its coefficient (-73.33333335).
Square it (5377.777780) and add it to both sides.

Add '5377.777780' to each side of the equation.
-146.6666667x + 5377.777780 + x2 = -50 + 5377.777780

Reorder the terms:
5377.777780 + -146.6666667x + x2 = -50 + 5377.777780

Combine like terms: -50 + 5377.777780 = 5327.77778
5377.777780 + -146.6666667x + x2 = 5327.77778

Factor a perfect square on the left side:
(x + -73.33333335)(x + -73.33333335) = 5327.77778

Calculate the square root of the right side: 72.99162815

Break this problem into two subproblems by setting 
(x + -73.33333335) equal to 72.99162815 and -72.99162815.

Subproblem 1

x + -73.33333335 = 72.99162815 Simplifying x + -73.33333335 = 72.99162815 Reorder the terms: -73.33333335 + x = 72.99162815 Solving -73.33333335 + x = 72.99162815 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '73.33333335' to each side of the equation. -73.33333335 + 73.33333335 + x = 72.99162815 + 73.33333335 Combine like terms: -73.33333335 + 73.33333335 = 0.00000000 0.00000000 + x = 72.99162815 + 73.33333335 x = 72.99162815 + 73.33333335 Combine like terms: 72.99162815 + 73.33333335 = 146.3249615 x = 146.3249615 Simplifying x = 146.3249615

Subproblem 2

x + -73.33333335 = -72.99162815 Simplifying x + -73.33333335 = -72.99162815 Reorder the terms: -73.33333335 + x = -72.99162815 Solving -73.33333335 + x = -72.99162815 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '73.33333335' to each side of the equation. -73.33333335 + 73.33333335 + x = -72.99162815 + 73.33333335 Combine like terms: -73.33333335 + 73.33333335 = 0.00000000 0.00000000 + x = -72.99162815 + 73.33333335 x = -72.99162815 + 73.33333335 Combine like terms: -72.99162815 + 73.33333335 = 0.3417052 x = 0.3417052 Simplifying x = 0.3417052

Solution

The solution to the problem is based on the solutions from the subproblems. x = {146.3249615, 0.3417052}

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