2y^2-16y=30

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Solution for 2y^2-16y=30 equation:


Simplifying
2y2 + -16y = 30

Reorder the terms:
-16y + 2y2 = 30

Solving
-16y + 2y2 = 30

Solving for variable 'y'.

Reorder the terms:
-30 + -16y + 2y2 = 30 + -30

Combine like terms: 30 + -30 = 0
-30 + -16y + 2y2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(-15 + -8y + y2) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(-15 + -8y + y2)' equal to zero and attempt to solve: Simplifying -15 + -8y + y2 = 0 Solving -15 + -8y + y2 = 0 Begin completing the square. Move the constant term to the right: Add '15' to each side of the equation. -15 + -8y + 15 + y2 = 0 + 15 Reorder the terms: -15 + 15 + -8y + y2 = 0 + 15 Combine like terms: -15 + 15 = 0 0 + -8y + y2 = 0 + 15 -8y + y2 = 0 + 15 Combine like terms: 0 + 15 = 15 -8y + y2 = 15 The y term is -8y. Take half its coefficient (-4). Square it (16) and add it to both sides. Add '16' to each side of the equation. -8y + 16 + y2 = 15 + 16 Reorder the terms: 16 + -8y + y2 = 15 + 16 Combine like terms: 15 + 16 = 31 16 + -8y + y2 = 31 Factor a perfect square on the left side: (y + -4)(y + -4) = 31 Calculate the square root of the right side: 5.567764363 Break this problem into two subproblems by setting (y + -4) equal to 5.567764363 and -5.567764363.

Subproblem 1

y + -4 = 5.567764363 Simplifying y + -4 = 5.567764363 Reorder the terms: -4 + y = 5.567764363 Solving -4 + y = 5.567764363 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + y = 5.567764363 + 4 Combine like terms: -4 + 4 = 0 0 + y = 5.567764363 + 4 y = 5.567764363 + 4 Combine like terms: 5.567764363 + 4 = 9.567764363 y = 9.567764363 Simplifying y = 9.567764363

Subproblem 2

y + -4 = -5.567764363 Simplifying y + -4 = -5.567764363 Reorder the terms: -4 + y = -5.567764363 Solving -4 + y = -5.567764363 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + y = -5.567764363 + 4 Combine like terms: -4 + 4 = 0 0 + y = -5.567764363 + 4 y = -5.567764363 + 4 Combine like terms: -5.567764363 + 4 = -1.567764363 y = -1.567764363 Simplifying y = -1.567764363

Solution

The solution to the problem is based on the solutions from the subproblems. y = {9.567764363, -1.567764363}

Solution

y = {9.567764363, -1.567764363}

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