15x-x^2=37

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Solution for 15x-x^2=37 equation:


Simplifying
15x + -1x2 = 37

Solving
15x + -1x2 = 37

Solving for variable 'x'.

Reorder the terms:
-37 + 15x + -1x2 = 37 + -37

Combine like terms: 37 + -37 = 0
-37 + 15x + -1x2 = 0

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

Divide each side by '-1'.
37 + -15x + x2 = 0

Move the constant term to the right:

Add '-37' to each side of the equation.
37 + -15x + -37 + x2 = 0 + -37

Reorder the terms:
37 + -37 + -15x + x2 = 0 + -37

Combine like terms: 37 + -37 = 0
0 + -15x + x2 = 0 + -37
-15x + x2 = 0 + -37

Combine like terms: 0 + -37 = -37
-15x + x2 = -37

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 = -37 + 56.25

Reorder the terms:
56.25 + -15x + x2 = -37 + 56.25

Combine like terms: -37 + 56.25 = 19.25
56.25 + -15x + x2 = 19.25

Factor a perfect square on the left side:
(x + -7.5)(x + -7.5) = 19.25

Calculate the square root of the right side: 4.387482194

Break this problem into two subproblems by setting 
(x + -7.5) equal to 4.387482194 and -4.387482194.

Subproblem 1

x + -7.5 = 4.387482194 Simplifying x + -7.5 = 4.387482194 Reorder the terms: -7.5 + x = 4.387482194 Solving -7.5 + x = 4.387482194 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 = 4.387482194 + 7.5 Combine like terms: -7.5 + 7.5 = 0.0 0.0 + x = 4.387482194 + 7.5 x = 4.387482194 + 7.5 Combine like terms: 4.387482194 + 7.5 = 11.887482194 x = 11.887482194 Simplifying x = 11.887482194

Subproblem 2

x + -7.5 = -4.387482194 Simplifying x + -7.5 = -4.387482194 Reorder the terms: -7.5 + x = -4.387482194 Solving -7.5 + x = -4.387482194 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 = -4.387482194 + 7.5 Combine like terms: -7.5 + 7.5 = 0.0 0.0 + x = -4.387482194 + 7.5 x = -4.387482194 + 7.5 Combine like terms: -4.387482194 + 7.5 = 3.112517806 x = 3.112517806 Simplifying x = 3.112517806

Solution

The solution to the problem is based on the solutions from the subproblems. x = {11.887482194, 3.112517806}

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