x^2-9x+2=36

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Solution for x^2-9x+2=36 equation:


Simplifying
x2 + -9x + 2 = 36

Reorder the terms:
2 + -9x + x2 = 36

Solving
2 + -9x + x2 = 36

Solving for variable 'x'.

Reorder the terms:
2 + -36 + -9x + x2 = 36 + -36

Combine like terms: 2 + -36 = -34
-34 + -9x + x2 = 36 + -36

Combine like terms: 36 + -36 = 0
-34 + -9x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '34' to each side of the equation.
-34 + -9x + 34 + x2 = 0 + 34

Reorder the terms:
-34 + 34 + -9x + x2 = 0 + 34

Combine like terms: -34 + 34 = 0
0 + -9x + x2 = 0 + 34
-9x + x2 = 0 + 34

Combine like terms: 0 + 34 = 34
-9x + x2 = 34

The x term is -9x.  Take half its coefficient (-4.5).
Square it (20.25) and add it to both sides.

Add '20.25' to each side of the equation.
-9x + 20.25 + x2 = 34 + 20.25

Reorder the terms:
20.25 + -9x + x2 = 34 + 20.25

Combine like terms: 34 + 20.25 = 54.25
20.25 + -9x + x2 = 54.25

Factor a perfect square on the left side:
(x + -4.5)(x + -4.5) = 54.25

Calculate the square root of the right side: 7.365459931

Break this problem into two subproblems by setting 
(x + -4.5) equal to 7.365459931 and -7.365459931.

Subproblem 1

x + -4.5 = 7.365459931 Simplifying x + -4.5 = 7.365459931 Reorder the terms: -4.5 + x = 7.365459931 Solving -4.5 + x = 7.365459931 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.5' to each side of the equation. -4.5 + 4.5 + x = 7.365459931 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + x = 7.365459931 + 4.5 x = 7.365459931 + 4.5 Combine like terms: 7.365459931 + 4.5 = 11.865459931 x = 11.865459931 Simplifying x = 11.865459931

Subproblem 2

x + -4.5 = -7.365459931 Simplifying x + -4.5 = -7.365459931 Reorder the terms: -4.5 + x = -7.365459931 Solving -4.5 + x = -7.365459931 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.5' to each side of the equation. -4.5 + 4.5 + x = -7.365459931 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + x = -7.365459931 + 4.5 x = -7.365459931 + 4.5 Combine like terms: -7.365459931 + 4.5 = -2.865459931 x = -2.865459931 Simplifying x = -2.865459931

Solution

The solution to the problem is based on the solutions from the subproblems. x = {11.865459931, -2.865459931}

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