y^2+12y+17=0

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Solution for y^2+12y+17=0 equation:


Simplifying
y2 + 12y + 17 = 0

Reorder the terms:
17 + 12y + y2 = 0

Solving
17 + 12y + y2 = 0

Solving for variable 'y'.

Begin completing the square.

Move the constant term to the right:

Add '-17' to each side of the equation.
17 + 12y + -17 + y2 = 0 + -17

Reorder the terms:
17 + -17 + 12y + y2 = 0 + -17

Combine like terms: 17 + -17 = 0
0 + 12y + y2 = 0 + -17
12y + y2 = 0 + -17

Combine like terms: 0 + -17 = -17
12y + y2 = -17

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 = -17 + 36

Reorder the terms:
36 + 12y + y2 = -17 + 36

Combine like terms: -17 + 36 = 19
36 + 12y + y2 = 19

Factor a perfect square on the left side:
(y + 6)(y + 6) = 19

Calculate the square root of the right side: 4.358898944

Break this problem into two subproblems by setting 
(y + 6) equal to 4.358898944 and -4.358898944.

Subproblem 1

y + 6 = 4.358898944 Simplifying y + 6 = 4.358898944 Reorder the terms: 6 + y = 4.358898944 Solving 6 + y = 4.358898944 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 = 4.358898944 + -6 Combine like terms: 6 + -6 = 0 0 + y = 4.358898944 + -6 y = 4.358898944 + -6 Combine like terms: 4.358898944 + -6 = -1.641101056 y = -1.641101056 Simplifying y = -1.641101056

Subproblem 2

y + 6 = -4.358898944 Simplifying y + 6 = -4.358898944 Reorder the terms: 6 + y = -4.358898944 Solving 6 + y = -4.358898944 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 = -4.358898944 + -6 Combine like terms: 6 + -6 = 0 0 + y = -4.358898944 + -6 y = -4.358898944 + -6 Combine like terms: -4.358898944 + -6 = -10.358898944 y = -10.358898944 Simplifying y = -10.358898944

Solution

The solution to the problem is based on the solutions from the subproblems. y = {-1.641101056, -10.358898944}

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