y^2+15=-4y

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Solution for y^2+15=-4y equation:


Simplifying
y2 + 15 = -4y

Reorder the terms:
15 + y2 = -4y

Solving
15 + y2 = -4y

Solving for variable 'y'.

Reorder the terms:
15 + 4y + y2 = -4y + 4y

Combine like terms: -4y + 4y = 0
15 + 4y + y2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-15' to each side of the equation.
15 + 4y + -15 + y2 = 0 + -15

Reorder the terms:
15 + -15 + 4y + y2 = 0 + -15

Combine like terms: 15 + -15 = 0
0 + 4y + y2 = 0 + -15
4y + y2 = 0 + -15

Combine like terms: 0 + -15 = -15
4y + y2 = -15

The y term is 4y.  Take half its coefficient (2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
4y + 4 + y2 = -15 + 4

Reorder the terms:
4 + 4y + y2 = -15 + 4

Combine like terms: -15 + 4 = -11
4 + 4y + y2 = -11

Factor a perfect square on the left side:
(y + 2)(y + 2) = -11

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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