0=y^2-6y+77

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Solution for 0=y^2-6y+77 equation:


Simplifying
0 = y2 + -6y + 77

Reorder the terms:
0 = 77 + -6y + y2

Solving
0 = 77 + -6y + y2

Solving for variable 'y'.

Combine like terms: 0 + -77 = -77
-77 + 6y + -1y2 = 77 + -6y + y2 + -77 + 6y + -1y2

Reorder the terms:
-77 + 6y + -1y2 = 77 + -77 + -6y + 6y + y2 + -1y2

Combine like terms: 77 + -77 = 0
-77 + 6y + -1y2 = 0 + -6y + 6y + y2 + -1y2
-77 + 6y + -1y2 = -6y + 6y + y2 + -1y2

Combine like terms: -6y + 6y = 0
-77 + 6y + -1y2 = 0 + y2 + -1y2
-77 + 6y + -1y2 = y2 + -1y2

Combine like terms: y2 + -1y2 = 0
-77 + 6y + -1y2 = 0

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

Divide each side by '-1'.
77 + -6y + y2 = 0

Move the constant term to the right:

Add '-77' to each side of the equation.
77 + -6y + -77 + y2 = 0 + -77

Reorder the terms:
77 + -77 + -6y + y2 = 0 + -77

Combine like terms: 77 + -77 = 0
0 + -6y + y2 = 0 + -77
-6y + y2 = 0 + -77

Combine like terms: 0 + -77 = -77
-6y + y2 = -77

The y term is -6y.  Take half its coefficient (-3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
-6y + 9 + y2 = -77 + 9

Reorder the terms:
9 + -6y + y2 = -77 + 9

Combine like terms: -77 + 9 = -68
9 + -6y + y2 = -68

Factor a perfect square on the left side:
(y + -3)(y + -3) = -68

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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