y^2=2y-15

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Solution for y^2=2y-15 equation:


Simplifying
y2 = 2y + -15

Reorder the terms:
y2 = -15 + 2y

Solving
y2 = -15 + 2y

Solving for variable 'y'.

Reorder the terms:
15 + -2y + y2 = -15 + 2y + 15 + -2y

Reorder the terms:
15 + -2y + y2 = -15 + 15 + 2y + -2y

Combine like terms: -15 + 15 = 0
15 + -2y + y2 = 0 + 2y + -2y
15 + -2y + y2 = 2y + -2y

Combine like terms: 2y + -2y = 0
15 + -2y + y2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-15' to each side of the equation.
15 + -2y + -15 + y2 = 0 + -15

Reorder the terms:
15 + -15 + -2y + y2 = 0 + -15

Combine like terms: 15 + -15 = 0
0 + -2y + y2 = 0 + -15
-2y + y2 = 0 + -15

Combine like terms: 0 + -15 = -15
-2y + y2 = -15

The y term is -2y.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2y + 1 + y2 = -15 + 1

Reorder the terms:
1 + -2y + y2 = -15 + 1

Combine like terms: -15 + 1 = -14
1 + -2y + y2 = -14

Factor a perfect square on the left side:
(y + -1)(y + -1) = -14

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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