n^2=3n-18

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Solution for n^2=3n-18 equation:


Simplifying
n2 = 3n + -18

Reorder the terms:
n2 = -18 + 3n

Solving
n2 = -18 + 3n

Solving for variable 'n'.

Reorder the terms:
18 + -3n + n2 = -18 + 3n + 18 + -3n

Reorder the terms:
18 + -3n + n2 = -18 + 18 + 3n + -3n

Combine like terms: -18 + 18 = 0
18 + -3n + n2 = 0 + 3n + -3n
18 + -3n + n2 = 3n + -3n

Combine like terms: 3n + -3n = 0
18 + -3n + n2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-18' to each side of the equation.
18 + -3n + -18 + n2 = 0 + -18

Reorder the terms:
18 + -18 + -3n + n2 = 0 + -18

Combine like terms: 18 + -18 = 0
0 + -3n + n2 = 0 + -18
-3n + n2 = 0 + -18

Combine like terms: 0 + -18 = -18
-3n + n2 = -18

The n term is -3n.  Take half its coefficient (-1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
-3n + 2.25 + n2 = -18 + 2.25

Reorder the terms:
2.25 + -3n + n2 = -18 + 2.25

Combine like terms: -18 + 2.25 = -15.75
2.25 + -3n + n2 = -15.75

Factor a perfect square on the left side:
(n + -1.5)(n + -1.5) = -15.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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