0=-x+20x+97-x^2

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Solution for 0=-x+20x+97-x^2 equation:


Simplifying
0 = -1x + 20x + 97 + -1x2

Reorder the terms:
0 = 97 + -1x + 20x + -1x2

Combine like terms: -1x + 20x = 19x
0 = 97 + 19x + -1x2

Solving
0 = 97 + 19x + -1x2

Solving for variable 'x'.

Combine like terms: 0 + -97 = -97
-97 + -19x + x2 = 97 + 19x + -1x2 + -97 + -19x + x2

Reorder the terms:
-97 + -19x + x2 = 97 + -97 + 19x + -19x + -1x2 + x2

Combine like terms: 97 + -97 = 0
-97 + -19x + x2 = 0 + 19x + -19x + -1x2 + x2
-97 + -19x + x2 = 19x + -19x + -1x2 + x2

Combine like terms: 19x + -19x = 0
-97 + -19x + x2 = 0 + -1x2 + x2
-97 + -19x + x2 = -1x2 + x2

Combine like terms: -1x2 + x2 = 0
-97 + -19x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '97' to each side of the equation.
-97 + -19x + 97 + x2 = 0 + 97

Reorder the terms:
-97 + 97 + -19x + x2 = 0 + 97

Combine like terms: -97 + 97 = 0
0 + -19x + x2 = 0 + 97
-19x + x2 = 0 + 97

Combine like terms: 0 + 97 = 97
-19x + x2 = 97

The x term is -19x.  Take half its coefficient (-9.5).
Square it (90.25) and add it to both sides.

Add '90.25' to each side of the equation.
-19x + 90.25 + x2 = 97 + 90.25

Reorder the terms:
90.25 + -19x + x2 = 97 + 90.25

Combine like terms: 97 + 90.25 = 187.25
90.25 + -19x + x2 = 187.25

Factor a perfect square on the left side:
(x + -9.5)(x + -9.5) = 187.25

Calculate the square root of the right side: 13.683932183

Break this problem into two subproblems by setting 
(x + -9.5) equal to 13.683932183 and -13.683932183.

Subproblem 1

x + -9.5 = 13.683932183 Simplifying x + -9.5 = 13.683932183 Reorder the terms: -9.5 + x = 13.683932183 Solving -9.5 + x = 13.683932183 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '9.5' to each side of the equation. -9.5 + 9.5 + x = 13.683932183 + 9.5 Combine like terms: -9.5 + 9.5 = 0.0 0.0 + x = 13.683932183 + 9.5 x = 13.683932183 + 9.5 Combine like terms: 13.683932183 + 9.5 = 23.183932183 x = 23.183932183 Simplifying x = 23.183932183

Subproblem 2

x + -9.5 = -13.683932183 Simplifying x + -9.5 = -13.683932183 Reorder the terms: -9.5 + x = -13.683932183 Solving -9.5 + x = -13.683932183 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '9.5' to each side of the equation. -9.5 + 9.5 + x = -13.683932183 + 9.5 Combine like terms: -9.5 + 9.5 = 0.0 0.0 + x = -13.683932183 + 9.5 x = -13.683932183 + 9.5 Combine like terms: -13.683932183 + 9.5 = -4.183932183 x = -4.183932183 Simplifying x = -4.183932183

Solution

The solution to the problem is based on the solutions from the subproblems. x = {23.183932183, -4.183932183}

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