x^2+18.5x=36

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Solution for x^2+18.5x=36 equation:


Simplifying
x2 + 18.5x = 36

Reorder the terms:
18.5x + x2 = 36

Solving
18.5x + x2 = 36

Solving for variable 'x'.

Reorder the terms:
-36 + 18.5x + x2 = 36 + -36

Combine like terms: 36 + -36 = 0
-36 + 18.5x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '36' to each side of the equation.
-36 + 18.5x + 36 + x2 = 0 + 36

Reorder the terms:
-36 + 36 + 18.5x + x2 = 0 + 36

Combine like terms: -36 + 36 = 0
0 + 18.5x + x2 = 0 + 36
18.5x + x2 = 0 + 36

Combine like terms: 0 + 36 = 36
18.5x + x2 = 36

The x term is 18.5x.  Take half its coefficient (9.25).
Square it (85.5625) and add it to both sides.

Add '85.5625' to each side of the equation.
18.5x + 85.5625 + x2 = 36 + 85.5625

Reorder the terms:
85.5625 + 18.5x + x2 = 36 + 85.5625

Combine like terms: 36 + 85.5625 = 121.5625
85.5625 + 18.5x + x2 = 121.5625

Factor a perfect square on the left side:
(x + 9.25)(x + 9.25) = 121.5625

Calculate the square root of the right side: 11.025538536

Break this problem into two subproblems by setting 
(x + 9.25) equal to 11.025538536 and -11.025538536.

Subproblem 1

x + 9.25 = 11.025538536 Simplifying x + 9.25 = 11.025538536 Reorder the terms: 9.25 + x = 11.025538536 Solving 9.25 + x = 11.025538536 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-9.25' to each side of the equation. 9.25 + -9.25 + x = 11.025538536 + -9.25 Combine like terms: 9.25 + -9.25 = 0.00 0.00 + x = 11.025538536 + -9.25 x = 11.025538536 + -9.25 Combine like terms: 11.025538536 + -9.25 = 1.775538536 x = 1.775538536 Simplifying x = 1.775538536

Subproblem 2

x + 9.25 = -11.025538536 Simplifying x + 9.25 = -11.025538536 Reorder the terms: 9.25 + x = -11.025538536 Solving 9.25 + x = -11.025538536 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-9.25' to each side of the equation. 9.25 + -9.25 + x = -11.025538536 + -9.25 Combine like terms: 9.25 + -9.25 = 0.00 0.00 + x = -11.025538536 + -9.25 x = -11.025538536 + -9.25 Combine like terms: -11.025538536 + -9.25 = -20.275538536 x = -20.275538536 Simplifying x = -20.275538536

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.775538536, -20.275538536}

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