3y(y+6)=30

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Solution for 3y(y+6)=30 equation:


Simplifying
3y(y + 6) = 30

Reorder the terms:
3y(6 + y) = 30
(6 * 3y + y * 3y) = 30
(18y + 3y2) = 30

Solving
18y + 3y2 = 30

Solving for variable 'y'.

Reorder the terms:
-30 + 18y + 3y2 = 30 + -30

Combine like terms: 30 + -30 = 0
-30 + 18y + 3y2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(-10 + 6y + y2) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(-10 + 6y + y2)' equal to zero and attempt to solve: Simplifying -10 + 6y + y2 = 0 Solving -10 + 6y + y2 = 0 Begin completing the square. Move the constant term to the right: Add '10' to each side of the equation. -10 + 6y + 10 + y2 = 0 + 10 Reorder the terms: -10 + 10 + 6y + y2 = 0 + 10 Combine like terms: -10 + 10 = 0 0 + 6y + y2 = 0 + 10 6y + y2 = 0 + 10 Combine like terms: 0 + 10 = 10 6y + y2 = 10 The y term is 6y. Take half its coefficient (3). Square it (9) and add it to both sides. Add '9' to each side of the equation. 6y + 9 + y2 = 10 + 9 Reorder the terms: 9 + 6y + y2 = 10 + 9 Combine like terms: 10 + 9 = 19 9 + 6y + y2 = 19 Factor a perfect square on the left side: (y + 3)(y + 3) = 19 Calculate the square root of the right side: 4.358898944 Break this problem into two subproblems by setting (y + 3) equal to 4.358898944 and -4.358898944.

Subproblem 1

y + 3 = 4.358898944 Simplifying y + 3 = 4.358898944 Reorder the terms: 3 + y = 4.358898944 Solving 3 + y = 4.358898944 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + y = 4.358898944 + -3 Combine like terms: 3 + -3 = 0 0 + y = 4.358898944 + -3 y = 4.358898944 + -3 Combine like terms: 4.358898944 + -3 = 1.358898944 y = 1.358898944 Simplifying y = 1.358898944

Subproblem 2

y + 3 = -4.358898944 Simplifying y + 3 = -4.358898944 Reorder the terms: 3 + y = -4.358898944 Solving 3 + y = -4.358898944 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + y = -4.358898944 + -3 Combine like terms: 3 + -3 = 0 0 + y = -4.358898944 + -3 y = -4.358898944 + -3 Combine like terms: -4.358898944 + -3 = -7.358898944 y = -7.358898944 Simplifying y = -7.358898944

Solution

The solution to the problem is based on the solutions from the subproblems. y = {1.358898944, -7.358898944}

Solution

y = {1.358898944, -7.358898944}

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