2y^2+17y+34=y^2+16

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Solution for 2y^2+17y+34=y^2+16 equation:


Simplifying
2y2 + 17y + 34 = y2 + 16

Reorder the terms:
34 + 17y + 2y2 = y2 + 16

Reorder the terms:
34 + 17y + 2y2 = 16 + y2

Solving
34 + 17y + 2y2 = 16 + y2

Solving for variable 'y'.

Reorder the terms:
34 + -16 + 17y + 2y2 + -1y2 = 16 + y2 + -16 + -1y2

Combine like terms: 34 + -16 = 18
18 + 17y + 2y2 + -1y2 = 16 + y2 + -16 + -1y2

Combine like terms: 2y2 + -1y2 = 1y2
18 + 17y + 1y2 = 16 + y2 + -16 + -1y2

Reorder the terms:
18 + 17y + 1y2 = 16 + -16 + y2 + -1y2

Combine like terms: 16 + -16 = 0
18 + 17y + 1y2 = 0 + y2 + -1y2
18 + 17y + 1y2 = y2 + -1y2

Combine like terms: y2 + -1y2 = 0
18 + 17y + 1y2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-18' to each side of the equation.
18 + 17y + -18 + y2 = 0 + -18

Reorder the terms:
18 + -18 + 17y + y2 = 0 + -18

Combine like terms: 18 + -18 = 0
0 + 17y + y2 = 0 + -18
17y + y2 = 0 + -18

Combine like terms: 0 + -18 = -18
17y + y2 = -18

The y term is 17y.  Take half its coefficient (8.5).
Square it (72.25) and add it to both sides.

Add '72.25' to each side of the equation.
17y + 72.25 + y2 = -18 + 72.25

Reorder the terms:
72.25 + 17y + y2 = -18 + 72.25

Combine like terms: -18 + 72.25 = 54.25
72.25 + 17y + y2 = 54.25

Factor a perfect square on the left side:
(y + 8.5)(y + 8.5) = 54.25

Calculate the square root of the right side: 7.365459931

Break this problem into two subproblems by setting 
(y + 8.5) equal to 7.365459931 and -7.365459931.

Subproblem 1

y + 8.5 = 7.365459931 Simplifying y + 8.5 = 7.365459931 Reorder the terms: 8.5 + y = 7.365459931 Solving 8.5 + y = 7.365459931 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-8.5' to each side of the equation. 8.5 + -8.5 + y = 7.365459931 + -8.5 Combine like terms: 8.5 + -8.5 = 0.0 0.0 + y = 7.365459931 + -8.5 y = 7.365459931 + -8.5 Combine like terms: 7.365459931 + -8.5 = -1.134540069 y = -1.134540069 Simplifying y = -1.134540069

Subproblem 2

y + 8.5 = -7.365459931 Simplifying y + 8.5 = -7.365459931 Reorder the terms: 8.5 + y = -7.365459931 Solving 8.5 + y = -7.365459931 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-8.5' to each side of the equation. 8.5 + -8.5 + y = -7.365459931 + -8.5 Combine like terms: 8.5 + -8.5 = 0.0 0.0 + y = -7.365459931 + -8.5 y = -7.365459931 + -8.5 Combine like terms: -7.365459931 + -8.5 = -15.865459931 y = -15.865459931 Simplifying y = -15.865459931

Solution

The solution to the problem is based on the solutions from the subproblems. y = {-1.134540069, -15.865459931}

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