y^2-8y+215=0

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Solution for y^2-8y+215=0 equation:


Simplifying
y2 + -8y + 215 = 0

Reorder the terms:
215 + -8y + y2 = 0

Solving
215 + -8y + y2 = 0

Solving for variable 'y'.

Begin completing the square.

Move the constant term to the right:

Add '-215' to each side of the equation.
215 + -8y + -215 + y2 = 0 + -215

Reorder the terms:
215 + -215 + -8y + y2 = 0 + -215

Combine like terms: 215 + -215 = 0
0 + -8y + y2 = 0 + -215
-8y + y2 = 0 + -215

Combine like terms: 0 + -215 = -215
-8y + y2 = -215

The y term is -8y.  Take half its coefficient (-4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
-8y + 16 + y2 = -215 + 16

Reorder the terms:
16 + -8y + y2 = -215 + 16

Combine like terms: -215 + 16 = -199
16 + -8y + y2 = -199

Factor a perfect square on the left side:
(y + -4)(y + -4) = -199

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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