-6y^2-9y=-11

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Solution for -6y^2-9y=-11 equation:


Simplifying
-6y2 + -9y = -11

Reorder the terms:
-9y + -6y2 = -11

Solving
-9y + -6y2 = -11

Solving for variable 'y'.

Reorder the terms:
11 + -9y + -6y2 = -11 + 11

Combine like terms: -11 + 11 = 0
11 + -9y + -6y2 = 0

Begin completing the square.  Divide all terms by
-6 the coefficient of the squared term: 

Divide each side by '-6'.
-1.833333333 + 1.5y + y2 = 0

Move the constant term to the right:

Add '1.833333333' to each side of the equation.
-1.833333333 + 1.5y + 1.833333333 + y2 = 0 + 1.833333333

Reorder the terms:
-1.833333333 + 1.833333333 + 1.5y + y2 = 0 + 1.833333333

Combine like terms: -1.833333333 + 1.833333333 = 0.000000000
0.000000000 + 1.5y + y2 = 0 + 1.833333333
1.5y + y2 = 0 + 1.833333333

Combine like terms: 0 + 1.833333333 = 1.833333333
1.5y + y2 = 1.833333333

The y term is 1.5y.  Take half its coefficient (0.75).
Square it (0.5625) and add it to both sides.

Add '0.5625' to each side of the equation.
1.5y + 0.5625 + y2 = 1.833333333 + 0.5625

Reorder the terms:
0.5625 + 1.5y + y2 = 1.833333333 + 0.5625

Combine like terms: 1.833333333 + 0.5625 = 2.395833333
0.5625 + 1.5y + y2 = 2.395833333

Factor a perfect square on the left side:
(y + 0.75)(y + 0.75) = 2.395833333

Calculate the square root of the right side: 1.547847968

Break this problem into two subproblems by setting 
(y + 0.75) equal to 1.547847968 and -1.547847968.

Subproblem 1

y + 0.75 = 1.547847968 Simplifying y + 0.75 = 1.547847968 Reorder the terms: 0.75 + y = 1.547847968 Solving 0.75 + y = 1.547847968 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-0.75' to each side of the equation. 0.75 + -0.75 + y = 1.547847968 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + y = 1.547847968 + -0.75 y = 1.547847968 + -0.75 Combine like terms: 1.547847968 + -0.75 = 0.797847968 y = 0.797847968 Simplifying y = 0.797847968

Subproblem 2

y + 0.75 = -1.547847968 Simplifying y + 0.75 = -1.547847968 Reorder the terms: 0.75 + y = -1.547847968 Solving 0.75 + y = -1.547847968 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-0.75' to each side of the equation. 0.75 + -0.75 + y = -1.547847968 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + y = -1.547847968 + -0.75 y = -1.547847968 + -0.75 Combine like terms: -1.547847968 + -0.75 = -2.297847968 y = -2.297847968 Simplifying y = -2.297847968

Solution

The solution to the problem is based on the solutions from the subproblems. y = {0.797847968, -2.297847968}

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