y(10-y)=36

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Solution for y(10-y)=36 equation:


Simplifying
y(10 + -1y) = 36
(10 * y + -1y * y) = 36
(10y + -1y2) = 36

Solving
10y + -1y2 = 36

Solving for variable 'y'.

Reorder the terms:
-36 + 10y + -1y2 = 36 + -36

Combine like terms: 36 + -36 = 0
-36 + 10y + -1y2 = 0

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

Divide each side by '-1'.
36 + -10y + y2 = 0

Move the constant term to the right:

Add '-36' to each side of the equation.
36 + -10y + -36 + y2 = 0 + -36

Reorder the terms:
36 + -36 + -10y + y2 = 0 + -36

Combine like terms: 36 + -36 = 0
0 + -10y + y2 = 0 + -36
-10y + y2 = 0 + -36

Combine like terms: 0 + -36 = -36
-10y + y2 = -36

The y term is -10y.  Take half its coefficient (-5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
-10y + 25 + y2 = -36 + 25

Reorder the terms:
25 + -10y + y2 = -36 + 25

Combine like terms: -36 + 25 = -11
25 + -10y + y2 = -11

Factor a perfect square on the left side:
(y + -5)(y + -5) = -11

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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