(y*y+4)-(y-2*8)=

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Solution for (y*y+4)-(y-2*8)= equation:


Simplifying
(y * y + 4) + -1(y + -2 * 8) = 0

Multiply y * y
(y2 + 4) + -1(y + -2 * 8) = 0

Reorder the terms:
(4 + y2) + -1(y + -2 * 8) = 0

Remove parenthesis around (4 + y2)
4 + y2 + -1(y + -2 * 8) = 0

Multiply -2 * 8
4 + y2 + -1(y + -16) = 0

Reorder the terms:
4 + y2 + -1(-16 + y) = 0
4 + y2 + (-16 * -1 + y * -1) = 0
4 + y2 + (16 + -1y) = 0

Reorder the terms:
4 + 16 + -1y + y2 = 0

Combine like terms: 4 + 16 = 20
20 + -1y + y2 = 0

Solving
20 + -1y + y2 = 0

Solving for variable 'y'.

Begin completing the square.

Move the constant term to the right:

Add '-20' to each side of the equation.
20 + -1y + -20 + y2 = 0 + -20

Reorder the terms:
20 + -20 + -1y + y2 = 0 + -20

Combine like terms: 20 + -20 = 0
0 + -1y + y2 = 0 + -20
-1y + y2 = 0 + -20

Combine like terms: 0 + -20 = -20
-1y + y2 = -20

The y term is -1y.  Take half its coefficient (-0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
-1y + 0.25 + y2 = -20 + 0.25

Reorder the terms:
0.25 + -1y + y2 = -20 + 0.25

Combine like terms: -20 + 0.25 = -19.75
0.25 + -1y + y2 = -19.75

Factor a perfect square on the left side:
(y + -0.5)(y + -0.5) = -19.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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