y^2-4y-2y=2y^2+6y+28

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Solution for y^2-4y-2y=2y^2+6y+28 equation:


Simplifying
y2 + -4y + -2y = 2y2 + 6y + 28

Reorder the terms:
-4y + -2y + y2 = 2y2 + 6y + 28

Combine like terms: -4y + -2y = -6y
-6y + y2 = 2y2 + 6y + 28

Reorder the terms:
-6y + y2 = 28 + 6y + 2y2

Solving
-6y + y2 = 28 + 6y + 2y2

Solving for variable 'y'.

Reorder the terms:
-28 + -6y + -6y + y2 + -2y2 = 28 + 6y + 2y2 + -28 + -6y + -2y2

Combine like terms: -6y + -6y = -12y
-28 + -12y + y2 + -2y2 = 28 + 6y + 2y2 + -28 + -6y + -2y2

Combine like terms: y2 + -2y2 = -1y2
-28 + -12y + -1y2 = 28 + 6y + 2y2 + -28 + -6y + -2y2

Reorder the terms:
-28 + -12y + -1y2 = 28 + -28 + 6y + -6y + 2y2 + -2y2

Combine like terms: 28 + -28 = 0
-28 + -12y + -1y2 = 0 + 6y + -6y + 2y2 + -2y2
-28 + -12y + -1y2 = 6y + -6y + 2y2 + -2y2

Combine like terms: 6y + -6y = 0
-28 + -12y + -1y2 = 0 + 2y2 + -2y2
-28 + -12y + -1y2 = 2y2 + -2y2

Combine like terms: 2y2 + -2y2 = 0
-28 + -12y + -1y2 = 0

Factor out the Greatest Common Factor (GCF), '-1'.
-1(28 + 12y + y2) = 0

Ignore the factor -1.

Subproblem 1

Set the factor '(28 + 12y + y2)' equal to zero and attempt to solve: Simplifying 28 + 12y + y2 = 0 Solving 28 + 12y + y2 = 0 Begin completing the square. Move the constant term to the right: Add '-28' to each side of the equation. 28 + 12y + -28 + y2 = 0 + -28 Reorder the terms: 28 + -28 + 12y + y2 = 0 + -28 Combine like terms: 28 + -28 = 0 0 + 12y + y2 = 0 + -28 12y + y2 = 0 + -28 Combine like terms: 0 + -28 = -28 12y + y2 = -28 The y term is 12y. Take half its coefficient (6). Square it (36) and add it to both sides. Add '36' to each side of the equation. 12y + 36 + y2 = -28 + 36 Reorder the terms: 36 + 12y + y2 = -28 + 36 Combine like terms: -28 + 36 = 8 36 + 12y + y2 = 8 Factor a perfect square on the left side: (y + 6)(y + 6) = 8 Calculate the square root of the right side: 2.828427125 Break this problem into two subproblems by setting (y + 6) equal to 2.828427125 and -2.828427125.

Subproblem 1

y + 6 = 2.828427125 Simplifying y + 6 = 2.828427125 Reorder the terms: 6 + y = 2.828427125 Solving 6 + y = 2.828427125 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + y = 2.828427125 + -6 Combine like terms: 6 + -6 = 0 0 + y = 2.828427125 + -6 y = 2.828427125 + -6 Combine like terms: 2.828427125 + -6 = -3.171572875 y = -3.171572875 Simplifying y = -3.171572875

Subproblem 2

y + 6 = -2.828427125 Simplifying y + 6 = -2.828427125 Reorder the terms: 6 + y = -2.828427125 Solving 6 + y = -2.828427125 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + y = -2.828427125 + -6 Combine like terms: 6 + -6 = 0 0 + y = -2.828427125 + -6 y = -2.828427125 + -6 Combine like terms: -2.828427125 + -6 = -8.828427125 y = -8.828427125 Simplifying y = -8.828427125

Solution

The solution to the problem is based on the solutions from the subproblems. y = {-3.171572875, -8.828427125}

Solution

y = {-3.171572875, -8.828427125}

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