3y^2-10y-6=

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Solution for 3y^2-10y-6= equation:


Simplifying
3y2 + -10y + -6 = 0

Reorder the terms:
-6 + -10y + 3y2 = 0

Solving
-6 + -10y + 3y2 = 0

Solving for variable 'y'.

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

Divide each side by '3'.
-2 + -3.333333333y + y2 = 0

Move the constant term to the right:

Add '2' to each side of the equation.
-2 + -3.333333333y + 2 + y2 = 0 + 2

Reorder the terms:
-2 + 2 + -3.333333333y + y2 = 0 + 2

Combine like terms: -2 + 2 = 0
0 + -3.333333333y + y2 = 0 + 2
-3.333333333y + y2 = 0 + 2

Combine like terms: 0 + 2 = 2
-3.333333333y + y2 = 2

The y term is -3.333333333y.  Take half its coefficient (-1.666666667).
Square it (2.777777779) and add it to both sides.

Add '2.777777779' to each side of the equation.
-3.333333333y + 2.777777779 + y2 = 2 + 2.777777779

Reorder the terms:
2.777777779 + -3.333333333y + y2 = 2 + 2.777777779

Combine like terms: 2 + 2.777777779 = 4.777777779
2.777777779 + -3.333333333y + y2 = 4.777777779

Factor a perfect square on the left side:
(y + -1.666666667)(y + -1.666666667) = 4.777777779

Calculate the square root of the right side: 2.185812842

Break this problem into two subproblems by setting 
(y + -1.666666667) equal to 2.185812842 and -2.185812842.

Subproblem 1

y + -1.666666667 = 2.185812842 Simplifying y + -1.666666667 = 2.185812842 Reorder the terms: -1.666666667 + y = 2.185812842 Solving -1.666666667 + y = 2.185812842 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '1.666666667' to each side of the equation. -1.666666667 + 1.666666667 + y = 2.185812842 + 1.666666667 Combine like terms: -1.666666667 + 1.666666667 = 0.000000000 0.000000000 + y = 2.185812842 + 1.666666667 y = 2.185812842 + 1.666666667 Combine like terms: 2.185812842 + 1.666666667 = 3.852479509 y = 3.852479509 Simplifying y = 3.852479509

Subproblem 2

y + -1.666666667 = -2.185812842 Simplifying y + -1.666666667 = -2.185812842 Reorder the terms: -1.666666667 + y = -2.185812842 Solving -1.666666667 + y = -2.185812842 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '1.666666667' to each side of the equation. -1.666666667 + 1.666666667 + y = -2.185812842 + 1.666666667 Combine like terms: -1.666666667 + 1.666666667 = 0.000000000 0.000000000 + y = -2.185812842 + 1.666666667 y = -2.185812842 + 1.666666667 Combine like terms: -2.185812842 + 1.666666667 = -0.519146175 y = -0.519146175 Simplifying y = -0.519146175

Solution

The solution to the problem is based on the solutions from the subproblems. y = {3.852479509, -0.519146175}

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