3y^2+18y-y-24=

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Solution for 3y^2+18y-y-24= equation:


Simplifying
3y2 + 18y + -1y + -24 = 0

Reorder the terms:
-24 + 18y + -1y + 3y2 = 0

Combine like terms: 18y + -1y = 17y
-24 + 17y + 3y2 = 0

Solving
-24 + 17y + 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'.
-8 + 5.666666667y + y2 = 0

Move the constant term to the right:

Add '8' to each side of the equation.
-8 + 5.666666667y + 8 + y2 = 0 + 8

Reorder the terms:
-8 + 8 + 5.666666667y + y2 = 0 + 8

Combine like terms: -8 + 8 = 0
0 + 5.666666667y + y2 = 0 + 8
5.666666667y + y2 = 0 + 8

Combine like terms: 0 + 8 = 8
5.666666667y + y2 = 8

The y term is 5.666666667y.  Take half its coefficient (2.833333334).
Square it (8.027777782) and add it to both sides.

Add '8.027777782' to each side of the equation.
5.666666667y + 8.027777782 + y2 = 8 + 8.027777782

Reorder the terms:
8.027777782 + 5.666666667y + y2 = 8 + 8.027777782

Combine like terms: 8 + 8.027777782 = 16.027777782
8.027777782 + 5.666666667y + y2 = 16.027777782

Factor a perfect square on the left side:
(y + 2.833333334)(y + 2.833333334) = 16.027777782

Calculate the square root of the right side: 4.003470717

Break this problem into two subproblems by setting 
(y + 2.833333334) equal to 4.003470717 and -4.003470717.

Subproblem 1

y + 2.833333334 = 4.003470717 Simplifying y + 2.833333334 = 4.003470717 Reorder the terms: 2.833333334 + y = 4.003470717 Solving 2.833333334 + y = 4.003470717 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-2.833333334' to each side of the equation. 2.833333334 + -2.833333334 + y = 4.003470717 + -2.833333334 Combine like terms: 2.833333334 + -2.833333334 = 0.000000000 0.000000000 + y = 4.003470717 + -2.833333334 y = 4.003470717 + -2.833333334 Combine like terms: 4.003470717 + -2.833333334 = 1.170137383 y = 1.170137383 Simplifying y = 1.170137383

Subproblem 2

y + 2.833333334 = -4.003470717 Simplifying y + 2.833333334 = -4.003470717 Reorder the terms: 2.833333334 + y = -4.003470717 Solving 2.833333334 + y = -4.003470717 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-2.833333334' to each side of the equation. 2.833333334 + -2.833333334 + y = -4.003470717 + -2.833333334 Combine like terms: 2.833333334 + -2.833333334 = 0.000000000 0.000000000 + y = -4.003470717 + -2.833333334 y = -4.003470717 + -2.833333334 Combine like terms: -4.003470717 + -2.833333334 = -6.836804051 y = -6.836804051 Simplifying y = -6.836804051

Solution

The solution to the problem is based on the solutions from the subproblems. y = {1.170137383, -6.836804051}

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