(y^2-6)+(90)+(y+1)=180

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Solution for (y^2-6)+(90)+(y+1)=180 equation:


Simplifying
(y2 + -6) + (90) + (y + 1) = 180

Reorder the terms:
(-6 + y2) + (90) + (y + 1) = 180

Remove parenthesis around (-6 + y2)
-6 + y2 + (90) + (y + 1) = 180
-6 + y2 + 90 + (y + 1) = 180

Reorder the terms:
-6 + y2 + 90 + (1 + y) = 180

Remove parenthesis around (1 + y)
-6 + y2 + 90 + 1 + y = 180

Reorder the terms:
-6 + 90 + 1 + y + y2 = 180

Combine like terms: -6 + 90 = 84
84 + 1 + y + y2 = 180

Combine like terms: 84 + 1 = 85
85 + y + y2 = 180

Solving
85 + y + y2 = 180

Solving for variable 'y'.

Reorder the terms:
85 + -180 + y + y2 = 180 + -180

Combine like terms: 85 + -180 = -95
-95 + y + y2 = 180 + -180

Combine like terms: 180 + -180 = 0
-95 + y + y2 = 0

Begin completing the square.

Move the constant term to the right:

Add '95' to each side of the equation.
-95 + y + 95 + y2 = 0 + 95

Reorder the terms:
-95 + 95 + y + y2 = 0 + 95

Combine like terms: -95 + 95 = 0
0 + y + y2 = 0 + 95
y + y2 = 0 + 95

Combine like terms: 0 + 95 = 95
y + y2 = 95

The y term is y.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
y + 0.25 + y2 = 95 + 0.25

Reorder the terms:
0.25 + y + y2 = 95 + 0.25

Combine like terms: 95 + 0.25 = 95.25
0.25 + y + y2 = 95.25

Factor a perfect square on the left side:
(y + 0.5)(y + 0.5) = 95.25

Calculate the square root of the right side: 9.759610648

Break this problem into two subproblems by setting 
(y + 0.5) equal to 9.759610648 and -9.759610648.

Subproblem 1

y + 0.5 = 9.759610648 Simplifying y + 0.5 = 9.759610648 Reorder the terms: 0.5 + y = 9.759610648 Solving 0.5 + y = 9.759610648 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + y = 9.759610648 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + y = 9.759610648 + -0.5 y = 9.759610648 + -0.5 Combine like terms: 9.759610648 + -0.5 = 9.259610648 y = 9.259610648 Simplifying y = 9.259610648

Subproblem 2

y + 0.5 = -9.759610648 Simplifying y + 0.5 = -9.759610648 Reorder the terms: 0.5 + y = -9.759610648 Solving 0.5 + y = -9.759610648 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + y = -9.759610648 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + y = -9.759610648 + -0.5 y = -9.759610648 + -0.5 Combine like terms: -9.759610648 + -0.5 = -10.259610648 y = -10.259610648 Simplifying y = -10.259610648

Solution

The solution to the problem is based on the solutions from the subproblems. y = {9.259610648, -10.259610648}

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