8y^2-12y-14=y+10

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Solution for 8y^2-12y-14=y+10 equation:


Simplifying
8y2 + -12y + -14 = y + 10

Reorder the terms:
-14 + -12y + 8y2 = y + 10

Reorder the terms:
-14 + -12y + 8y2 = 10 + y

Solving
-14 + -12y + 8y2 = 10 + y

Solving for variable 'y'.

Reorder the terms:
-14 + -10 + -12y + -1y + 8y2 = 10 + y + -10 + -1y

Combine like terms: -14 + -10 = -24
-24 + -12y + -1y + 8y2 = 10 + y + -10 + -1y

Combine like terms: -12y + -1y = -13y
-24 + -13y + 8y2 = 10 + y + -10 + -1y

Reorder the terms:
-24 + -13y + 8y2 = 10 + -10 + y + -1y

Combine like terms: 10 + -10 = 0
-24 + -13y + 8y2 = 0 + y + -1y
-24 + -13y + 8y2 = y + -1y

Combine like terms: y + -1y = 0
-24 + -13y + 8y2 = 0

Begin completing the square.  Divide all terms by
8 the coefficient of the squared term: 

Divide each side by '8'.
-3 + -1.625y + y2 = 0

Move the constant term to the right:

Add '3' to each side of the equation.
-3 + -1.625y + 3 + y2 = 0 + 3

Reorder the terms:
-3 + 3 + -1.625y + y2 = 0 + 3

Combine like terms: -3 + 3 = 0
0 + -1.625y + y2 = 0 + 3
-1.625y + y2 = 0 + 3

Combine like terms: 0 + 3 = 3
-1.625y + y2 = 3

The y term is -1.625y.  Take half its coefficient (-0.8125).
Square it (0.66015625) and add it to both sides.

Add '0.66015625' to each side of the equation.
-1.625y + 0.66015625 + y2 = 3 + 0.66015625

Reorder the terms:
0.66015625 + -1.625y + y2 = 3 + 0.66015625

Combine like terms: 3 + 0.66015625 = 3.66015625
0.66015625 + -1.625y + y2 = 3.66015625

Factor a perfect square on the left side:
(y + -0.8125)(y + -0.8125) = 3.66015625

Calculate the square root of the right side: 1.913153483

Break this problem into two subproblems by setting 
(y + -0.8125) equal to 1.913153483 and -1.913153483.

Subproblem 1

y + -0.8125 = 1.913153483 Simplifying y + -0.8125 = 1.913153483 Reorder the terms: -0.8125 + y = 1.913153483 Solving -0.8125 + y = 1.913153483 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.8125' to each side of the equation. -0.8125 + 0.8125 + y = 1.913153483 + 0.8125 Combine like terms: -0.8125 + 0.8125 = 0.0000 0.0000 + y = 1.913153483 + 0.8125 y = 1.913153483 + 0.8125 Combine like terms: 1.913153483 + 0.8125 = 2.725653483 y = 2.725653483 Simplifying y = 2.725653483

Subproblem 2

y + -0.8125 = -1.913153483 Simplifying y + -0.8125 = -1.913153483 Reorder the terms: -0.8125 + y = -1.913153483 Solving -0.8125 + y = -1.913153483 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.8125' to each side of the equation. -0.8125 + 0.8125 + y = -1.913153483 + 0.8125 Combine like terms: -0.8125 + 0.8125 = 0.0000 0.0000 + y = -1.913153483 + 0.8125 y = -1.913153483 + 0.8125 Combine like terms: -1.913153483 + 0.8125 = -1.100653483 y = -1.100653483 Simplifying y = -1.100653483

Solution

The solution to the problem is based on the solutions from the subproblems. y = {2.725653483, -1.100653483}

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