=y^2-4y+6

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Solution for =y^2-4y+6 equation:


Simplifying
0 = y2 + -4y + 6

Reorder the terms:
0 = 6 + -4y + y2

Solving
0 = 6 + -4y + y2

Solving for variable 'y'.

Combine like terms: 0 + -6 = -6
-6 + 4y + -1y2 = 6 + -4y + y2 + -6 + 4y + -1y2

Reorder the terms:
-6 + 4y + -1y2 = 6 + -6 + -4y + 4y + y2 + -1y2

Combine like terms: 6 + -6 = 0
-6 + 4y + -1y2 = 0 + -4y + 4y + y2 + -1y2
-6 + 4y + -1y2 = -4y + 4y + y2 + -1y2

Combine like terms: -4y + 4y = 0
-6 + 4y + -1y2 = 0 + y2 + -1y2
-6 + 4y + -1y2 = y2 + -1y2

Combine like terms: y2 + -1y2 = 0
-6 + 4y + -1y2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
6 + -4y + y2 = 0

Move the constant term to the right:

Add '-6' to each side of the equation.
6 + -4y + -6 + y2 = 0 + -6

Reorder the terms:
6 + -6 + -4y + y2 = 0 + -6

Combine like terms: 6 + -6 = 0
0 + -4y + y2 = 0 + -6
-4y + y2 = 0 + -6

Combine like terms: 0 + -6 = -6
-4y + y2 = -6

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 = -6 + 4

Reorder the terms:
4 + -4y + y2 = -6 + 4

Combine like terms: -6 + 4 = -2
4 + -4y + y2 = -2

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

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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