x^2=15x+326

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Solution for x^2=15x+326 equation:


Simplifying
x2 = 15x + 326

Reorder the terms:
x2 = 326 + 15x

Solving
x2 = 326 + 15x

Solving for variable 'x'.

Reorder the terms:
-326 + -15x + x2 = 326 + 15x + -326 + -15x

Reorder the terms:
-326 + -15x + x2 = 326 + -326 + 15x + -15x

Combine like terms: 326 + -326 = 0
-326 + -15x + x2 = 0 + 15x + -15x
-326 + -15x + x2 = 15x + -15x

Combine like terms: 15x + -15x = 0
-326 + -15x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '326' to each side of the equation.
-326 + -15x + 326 + x2 = 0 + 326

Reorder the terms:
-326 + 326 + -15x + x2 = 0 + 326

Combine like terms: -326 + 326 = 0
0 + -15x + x2 = 0 + 326
-15x + x2 = 0 + 326

Combine like terms: 0 + 326 = 326
-15x + x2 = 326

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 = 326 + 56.25

Reorder the terms:
56.25 + -15x + x2 = 326 + 56.25

Combine like terms: 326 + 56.25 = 382.25
56.25 + -15x + x2 = 382.25

Factor a perfect square on the left side:
(x + -7.5)(x + -7.5) = 382.25

Calculate the square root of the right side: 19.551214796

Break this problem into two subproblems by setting 
(x + -7.5) equal to 19.551214796 and -19.551214796.

Subproblem 1

x + -7.5 = 19.551214796 Simplifying x + -7.5 = 19.551214796 Reorder the terms: -7.5 + x = 19.551214796 Solving -7.5 + x = 19.551214796 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 = 19.551214796 + 7.5 Combine like terms: -7.5 + 7.5 = 0.0 0.0 + x = 19.551214796 + 7.5 x = 19.551214796 + 7.5 Combine like terms: 19.551214796 + 7.5 = 27.051214796 x = 27.051214796 Simplifying x = 27.051214796

Subproblem 2

x + -7.5 = -19.551214796 Simplifying x + -7.5 = -19.551214796 Reorder the terms: -7.5 + x = -19.551214796 Solving -7.5 + x = -19.551214796 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 = -19.551214796 + 7.5 Combine like terms: -7.5 + 7.5 = 0.0 0.0 + x = -19.551214796 + 7.5 x = -19.551214796 + 7.5 Combine like terms: -19.551214796 + 7.5 = -12.051214796 x = -12.051214796 Simplifying x = -12.051214796

Solution

The solution to the problem is based on the solutions from the subproblems. x = {27.051214796, -12.051214796}

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