-3y^2-54y=57

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Solution for -3y^2-54y=57 equation:


Simplifying
-3y2 + -54y = 57

Reorder the terms:
-54y + -3y2 = 57

Solving
-54y + -3y2 = 57

Solving for variable 'y'.

Reorder the terms:
-57 + -54y + -3y2 = 57 + -57

Combine like terms: 57 + -57 = 0
-57 + -54y + -3y2 = 0

Factor out the Greatest Common Factor (GCF), '-3'.
-3(19 + 18y + y2) = 0

Ignore the factor -3.

Subproblem 1

Set the factor '(19 + 18y + y2)' equal to zero and attempt to solve: Simplifying 19 + 18y + y2 = 0 Solving 19 + 18y + y2 = 0 Begin completing the square. Move the constant term to the right: Add '-19' to each side of the equation. 19 + 18y + -19 + y2 = 0 + -19 Reorder the terms: 19 + -19 + 18y + y2 = 0 + -19 Combine like terms: 19 + -19 = 0 0 + 18y + y2 = 0 + -19 18y + y2 = 0 + -19 Combine like terms: 0 + -19 = -19 18y + y2 = -19 The y term is 18y. Take half its coefficient (9). Square it (81) and add it to both sides. Add '81' to each side of the equation. 18y + 81 + y2 = -19 + 81 Reorder the terms: 81 + 18y + y2 = -19 + 81 Combine like terms: -19 + 81 = 62 81 + 18y + y2 = 62 Factor a perfect square on the left side: (y + 9)(y + 9) = 62 Calculate the square root of the right side: 7.874007874 Break this problem into two subproblems by setting (y + 9) equal to 7.874007874 and -7.874007874.

Subproblem 1

y + 9 = 7.874007874 Simplifying y + 9 = 7.874007874 Reorder the terms: 9 + y = 7.874007874 Solving 9 + y = 7.874007874 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + y = 7.874007874 + -9 Combine like terms: 9 + -9 = 0 0 + y = 7.874007874 + -9 y = 7.874007874 + -9 Combine like terms: 7.874007874 + -9 = -1.125992126 y = -1.125992126 Simplifying y = -1.125992126

Subproblem 2

y + 9 = -7.874007874 Simplifying y + 9 = -7.874007874 Reorder the terms: 9 + y = -7.874007874 Solving 9 + y = -7.874007874 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + y = -7.874007874 + -9 Combine like terms: 9 + -9 = 0 0 + y = -7.874007874 + -9 y = -7.874007874 + -9 Combine like terms: -7.874007874 + -9 = -16.874007874 y = -16.874007874 Simplifying y = -16.874007874

Solution

The solution to the problem is based on the solutions from the subproblems. y = {-1.125992126, -16.874007874}

Solution

y = {-1.125992126, -16.874007874}

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