5x-x^2-2=8

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Solution for 5x-x^2-2=8 equation:


Simplifying
5x + -1x2 + -2 = 8

Reorder the terms:
-2 + 5x + -1x2 = 8

Solving
-2 + 5x + -1x2 = 8

Solving for variable 'x'.

Reorder the terms:
-2 + -8 + 5x + -1x2 = 8 + -8

Combine like terms: -2 + -8 = -10
-10 + 5x + -1x2 = 8 + -8

Combine like terms: 8 + -8 = 0
-10 + 5x + -1x2 = 0

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

Divide each side by '-1'.
10 + -5x + x2 = 0

Move the constant term to the right:

Add '-10' to each side of the equation.
10 + -5x + -10 + x2 = 0 + -10

Reorder the terms:
10 + -10 + -5x + x2 = 0 + -10

Combine like terms: 10 + -10 = 0
0 + -5x + x2 = 0 + -10
-5x + x2 = 0 + -10

Combine like terms: 0 + -10 = -10
-5x + x2 = -10

The x term is -5x.  Take half its coefficient (-2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
-5x + 6.25 + x2 = -10 + 6.25

Reorder the terms:
6.25 + -5x + x2 = -10 + 6.25

Combine like terms: -10 + 6.25 = -3.75
6.25 + -5x + x2 = -3.75

Factor a perfect square on the left side:
(x + -2.5)(x + -2.5) = -3.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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