15x-x^2-48=0

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Solution for 15x-x^2-48=0 equation:


Simplifying
15x + -1x2 + -48 = 0

Reorder the terms:
-48 + 15x + -1x2 = 0

Solving
-48 + 15x + -1x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
48 + -15x + x2 = 0

Move the constant term to the right:

Add '-48' to each side of the equation.
48 + -15x + -48 + x2 = 0 + -48

Reorder the terms:
48 + -48 + -15x + x2 = 0 + -48

Combine like terms: 48 + -48 = 0
0 + -15x + x2 = 0 + -48
-15x + x2 = 0 + -48

Combine like terms: 0 + -48 = -48
-15x + x2 = -48

The x term is -15x.  Take half its coefficient (-7.5).
Square it (56.25) and add it to both sides.

Add '56.25' to each side of the equation.
-15x + 56.25 + x2 = -48 + 56.25

Reorder the terms:
56.25 + -15x + x2 = -48 + 56.25

Combine like terms: -48 + 56.25 = 8.25
56.25 + -15x + x2 = 8.25

Factor a perfect square on the left side:
(x + -7.5)(x + -7.5) = 8.25

Calculate the square root of the right side: 2.872281323

Break this problem into two subproblems by setting 
(x + -7.5) equal to 2.872281323 and -2.872281323.

Subproblem 1

x + -7.5 = 2.872281323 Simplifying x + -7.5 = 2.872281323 Reorder the terms: -7.5 + x = 2.872281323 Solving -7.5 + x = 2.872281323 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7.5' to each side of the equation. -7.5 + 7.5 + x = 2.872281323 + 7.5 Combine like terms: -7.5 + 7.5 = 0.0 0.0 + x = 2.872281323 + 7.5 x = 2.872281323 + 7.5 Combine like terms: 2.872281323 + 7.5 = 10.372281323 x = 10.372281323 Simplifying x = 10.372281323

Subproblem 2

x + -7.5 = -2.872281323 Simplifying x + -7.5 = -2.872281323 Reorder the terms: -7.5 + x = -2.872281323 Solving -7.5 + x = -2.872281323 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7.5' to each side of the equation. -7.5 + 7.5 + x = -2.872281323 + 7.5 Combine like terms: -7.5 + 7.5 = 0.0 0.0 + x = -2.872281323 + 7.5 x = -2.872281323 + 7.5 Combine like terms: -2.872281323 + 7.5 = 4.627718677 x = 4.627718677 Simplifying x = 4.627718677

Solution

The solution to the problem is based on the solutions from the subproblems. x = {10.372281323, 4.627718677}

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