19x=x^2+18x+81

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Solution for 19x=x^2+18x+81 equation:


Simplifying
19x = x2 + 18x + 81

Reorder the terms:
19x = 81 + 18x + x2

Solving
19x = 81 + 18x + x2

Solving for variable 'x'.

Reorder the terms:
-81 + 19x + -18x + -1x2 = 81 + 18x + x2 + -81 + -18x + -1x2

Combine like terms: 19x + -18x = 1x
-81 + 1x + -1x2 = 81 + 18x + x2 + -81 + -18x + -1x2

Reorder the terms:
-81 + 1x + -1x2 = 81 + -81 + 18x + -18x + x2 + -1x2

Combine like terms: 81 + -81 = 0
-81 + 1x + -1x2 = 0 + 18x + -18x + x2 + -1x2
-81 + 1x + -1x2 = 18x + -18x + x2 + -1x2

Combine like terms: 18x + -18x = 0
-81 + 1x + -1x2 = 0 + x2 + -1x2
-81 + 1x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-81 + 1x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
81 + -1x + x2 = 0

Move the constant term to the right:

Add '-81' to each side of the equation.
81 + -1x + -81 + x2 = 0 + -81

Reorder the terms:
81 + -81 + -1x + x2 = 0 + -81

Combine like terms: 81 + -81 = 0
0 + -1x + x2 = 0 + -81
-1x + x2 = 0 + -81

Combine like terms: 0 + -81 = -81
-1x + x2 = -81

The x term is -1x.  Take half its coefficient (-0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
-1x + 0.25 + x2 = -81 + 0.25

Reorder the terms:
0.25 + -1x + x2 = -81 + 0.25

Combine like terms: -81 + 0.25 = -80.75
0.25 + -1x + x2 = -80.75

Factor a perfect square on the left side:
(x + -0.5)(x + -0.5) = -80.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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