7y^2-10+11=y+17

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Solution for 7y^2-10+11=y+17 equation:


Simplifying
7y2 + -10 + 11 = y + 17

Reorder the terms:
-10 + 11 + 7y2 = y + 17

Combine like terms: -10 + 11 = 1
1 + 7y2 = y + 17

Reorder the terms:
1 + 7y2 = 17 + y

Solving
1 + 7y2 = 17 + y

Solving for variable 'y'.

Reorder the terms:
1 + -17 + -1y + 7y2 = 17 + y + -17 + -1y

Combine like terms: 1 + -17 = -16
-16 + -1y + 7y2 = 17 + y + -17 + -1y

Reorder the terms:
-16 + -1y + 7y2 = 17 + -17 + y + -1y

Combine like terms: 17 + -17 = 0
-16 + -1y + 7y2 = 0 + y + -1y
-16 + -1y + 7y2 = y + -1y

Combine like terms: y + -1y = 0
-16 + -1y + 7y2 = 0

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

Divide each side by '7'.
-2.285714286 + -0.1428571429y + y2 = 0

Move the constant term to the right:

Add '2.285714286' to each side of the equation.
-2.285714286 + -0.1428571429y + 2.285714286 + y2 = 0 + 2.285714286

Reorder the terms:
-2.285714286 + 2.285714286 + -0.1428571429y + y2 = 0 + 2.285714286

Combine like terms: -2.285714286 + 2.285714286 = 0.000000000
0.000000000 + -0.1428571429y + y2 = 0 + 2.285714286
-0.1428571429y + y2 = 0 + 2.285714286

Combine like terms: 0 + 2.285714286 = 2.285714286
-0.1428571429y + y2 = 2.285714286

The y term is -0.1428571429y.  Take half its coefficient (-0.07142857145).
Square it (0.005102040819) and add it to both sides.

Add '0.005102040819' to each side of the equation.
-0.1428571429y + 0.005102040819 + y2 = 2.285714286 + 0.005102040819

Reorder the terms:
0.005102040819 + -0.1428571429y + y2 = 2.285714286 + 0.005102040819

Combine like terms: 2.285714286 + 0.005102040819 = 2.290816326819
0.005102040819 + -0.1428571429y + y2 = 2.290816326819

Factor a perfect square on the left side:
(y + -0.07142857145)(y + -0.07142857145) = 2.290816326819

Calculate the square root of the right side: 1.513544293

Break this problem into two subproblems by setting 
(y + -0.07142857145) equal to 1.513544293 and -1.513544293.

Subproblem 1

y + -0.07142857145 = 1.513544293 Simplifying y + -0.07142857145 = 1.513544293 Reorder the terms: -0.07142857145 + y = 1.513544293 Solving -0.07142857145 + y = 1.513544293 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.07142857145' to each side of the equation. -0.07142857145 + 0.07142857145 + y = 1.513544293 + 0.07142857145 Combine like terms: -0.07142857145 + 0.07142857145 = 0.00000000000 0.00000000000 + y = 1.513544293 + 0.07142857145 y = 1.513544293 + 0.07142857145 Combine like terms: 1.513544293 + 0.07142857145 = 1.58497286445 y = 1.58497286445 Simplifying y = 1.58497286445

Subproblem 2

y + -0.07142857145 = -1.513544293 Simplifying y + -0.07142857145 = -1.513544293 Reorder the terms: -0.07142857145 + y = -1.513544293 Solving -0.07142857145 + y = -1.513544293 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.07142857145' to each side of the equation. -0.07142857145 + 0.07142857145 + y = -1.513544293 + 0.07142857145 Combine like terms: -0.07142857145 + 0.07142857145 = 0.00000000000 0.00000000000 + y = -1.513544293 + 0.07142857145 y = -1.513544293 + 0.07142857145 Combine like terms: -1.513544293 + 0.07142857145 = -1.44211572155 y = -1.44211572155 Simplifying y = -1.44211572155

Solution

The solution to the problem is based on the solutions from the subproblems. y = {1.58497286445, -1.44211572155}

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