x^2-3x-36=362

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Solution for x^2-3x-36=362 equation:


Simplifying
x2 + -3x + -36 = 362

Reorder the terms:
-36 + -3x + x2 = 362

Solving
-36 + -3x + x2 = 362

Solving for variable 'x'.

Reorder the terms:
-36 + -362 + -3x + x2 = 362 + -362

Combine like terms: -36 + -362 = -398
-398 + -3x + x2 = 362 + -362

Combine like terms: 362 + -362 = 0
-398 + -3x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '398' to each side of the equation.
-398 + -3x + 398 + x2 = 0 + 398

Reorder the terms:
-398 + 398 + -3x + x2 = 0 + 398

Combine like terms: -398 + 398 = 0
0 + -3x + x2 = 0 + 398
-3x + x2 = 0 + 398

Combine like terms: 0 + 398 = 398
-3x + x2 = 398

The x term is -3x.  Take half its coefficient (-1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
-3x + 2.25 + x2 = 398 + 2.25

Reorder the terms:
2.25 + -3x + x2 = 398 + 2.25

Combine like terms: 398 + 2.25 = 400.25
2.25 + -3x + x2 = 400.25

Factor a perfect square on the left side:
(x + -1.5)(x + -1.5) = 400.25

Calculate the square root of the right side: 20.006249024

Break this problem into two subproblems by setting 
(x + -1.5) equal to 20.006249024 and -20.006249024.

Subproblem 1

x + -1.5 = 20.006249024 Simplifying x + -1.5 = 20.006249024 Reorder the terms: -1.5 + x = 20.006249024 Solving -1.5 + x = 20.006249024 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = 20.006249024 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = 20.006249024 + 1.5 x = 20.006249024 + 1.5 Combine like terms: 20.006249024 + 1.5 = 21.506249024 x = 21.506249024 Simplifying x = 21.506249024

Subproblem 2

x + -1.5 = -20.006249024 Simplifying x + -1.5 = -20.006249024 Reorder the terms: -1.5 + x = -20.006249024 Solving -1.5 + x = -20.006249024 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = -20.006249024 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = -20.006249024 + 1.5 x = -20.006249024 + 1.5 Combine like terms: -20.006249024 + 1.5 = -18.506249024 x = -18.506249024 Simplifying x = -18.506249024

Solution

The solution to the problem is based on the solutions from the subproblems. x = {21.506249024, -18.506249024}

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