n^2-3n+90=0

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Solution for n^2-3n+90=0 equation:


Simplifying
n2 + -3n + 90 = 0

Reorder the terms:
90 + -3n + n2 = 0

Solving
90 + -3n + n2 = 0

Solving for variable 'n'.

Begin completing the square.

Move the constant term to the right:

Add '-90' to each side of the equation.
90 + -3n + -90 + n2 = 0 + -90

Reorder the terms:
90 + -90 + -3n + n2 = 0 + -90

Combine like terms: 90 + -90 = 0
0 + -3n + n2 = 0 + -90
-3n + n2 = 0 + -90

Combine like terms: 0 + -90 = -90
-3n + n2 = -90

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 = -90 + 2.25

Reorder the terms:
2.25 + -3n + n2 = -90 + 2.25

Combine like terms: -90 + 2.25 = -87.75
2.25 + -3n + n2 = -87.75

Factor a perfect square on the left side:
(n + -1.5)(n + -1.5) = -87.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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