x^2-15x-52=0

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Solution for x^2-15x-52=0 equation:


Simplifying
x2 + -15x + -52 = 0

Reorder the terms:
-52 + -15x + x2 = 0

Solving
-52 + -15x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '52' to each side of the equation.
-52 + -15x + 52 + x2 = 0 + 52

Reorder the terms:
-52 + 52 + -15x + x2 = 0 + 52

Combine like terms: -52 + 52 = 0
0 + -15x + x2 = 0 + 52
-15x + x2 = 0 + 52

Combine like terms: 0 + 52 = 52
-15x + x2 = 52

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 = 52 + 56.25

Reorder the terms:
56.25 + -15x + x2 = 52 + 56.25

Combine like terms: 52 + 56.25 = 108.25
56.25 + -15x + x2 = 108.25

Factor a perfect square on the left side:
(x + -7.5)(x + -7.5) = 108.25

Calculate the square root of the right side: 10.404326023

Break this problem into two subproblems by setting 
(x + -7.5) equal to 10.404326023 and -10.404326023.

Subproblem 1

x + -7.5 = 10.404326023 Simplifying x + -7.5 = 10.404326023 Reorder the terms: -7.5 + x = 10.404326023 Solving -7.5 + x = 10.404326023 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 = 10.404326023 + 7.5 Combine like terms: -7.5 + 7.5 = 0.0 0.0 + x = 10.404326023 + 7.5 x = 10.404326023 + 7.5 Combine like terms: 10.404326023 + 7.5 = 17.904326023 x = 17.904326023 Simplifying x = 17.904326023

Subproblem 2

x + -7.5 = -10.404326023 Simplifying x + -7.5 = -10.404326023 Reorder the terms: -7.5 + x = -10.404326023 Solving -7.5 + x = -10.404326023 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 = -10.404326023 + 7.5 Combine like terms: -7.5 + 7.5 = 0.0 0.0 + x = -10.404326023 + 7.5 x = -10.404326023 + 7.5 Combine like terms: -10.404326023 + 7.5 = -2.904326023 x = -2.904326023 Simplifying x = -2.904326023

Solution

The solution to the problem is based on the solutions from the subproblems. x = {17.904326023, -2.904326023}

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