a^2-2a-224=8

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Solution for a^2-2a-224=8 equation:


Simplifying
a2 + -2a + -224 = 8

Reorder the terms:
-224 + -2a + a2 = 8

Solving
-224 + -2a + a2 = 8

Solving for variable 'a'.

Reorder the terms:
-224 + -8 + -2a + a2 = 8 + -8

Combine like terms: -224 + -8 = -232
-232 + -2a + a2 = 8 + -8

Combine like terms: 8 + -8 = 0
-232 + -2a + a2 = 0

Begin completing the square.

Move the constant term to the right:

Add '232' to each side of the equation.
-232 + -2a + 232 + a2 = 0 + 232

Reorder the terms:
-232 + 232 + -2a + a2 = 0 + 232

Combine like terms: -232 + 232 = 0
0 + -2a + a2 = 0 + 232
-2a + a2 = 0 + 232

Combine like terms: 0 + 232 = 232
-2a + a2 = 232

The a term is -2a.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2a + 1 + a2 = 232 + 1

Reorder the terms:
1 + -2a + a2 = 232 + 1

Combine like terms: 232 + 1 = 233
1 + -2a + a2 = 233

Factor a perfect square on the left side:
(a + -1)(a + -1) = 233

Calculate the square root of the right side: 15.264337522

Break this problem into two subproblems by setting 
(a + -1) equal to 15.264337522 and -15.264337522.

Subproblem 1

a + -1 = 15.264337522 Simplifying a + -1 = 15.264337522 Reorder the terms: -1 + a = 15.264337522 Solving -1 + a = 15.264337522 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + a = 15.264337522 + 1 Combine like terms: -1 + 1 = 0 0 + a = 15.264337522 + 1 a = 15.264337522 + 1 Combine like terms: 15.264337522 + 1 = 16.264337522 a = 16.264337522 Simplifying a = 16.264337522

Subproblem 2

a + -1 = -15.264337522 Simplifying a + -1 = -15.264337522 Reorder the terms: -1 + a = -15.264337522 Solving -1 + a = -15.264337522 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + a = -15.264337522 + 1 Combine like terms: -1 + 1 = 0 0 + a = -15.264337522 + 1 a = -15.264337522 + 1 Combine like terms: -15.264337522 + 1 = -14.264337522 a = -14.264337522 Simplifying a = -14.264337522

Solution

The solution to the problem is based on the solutions from the subproblems. a = {16.264337522, -14.264337522}

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