y^2+14y-14=0

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Solution for y^2+14y-14=0 equation:


Simplifying
y2 + 14y + -14 = 0

Reorder the terms:
-14 + 14y + y2 = 0

Solving
-14 + 14y + y2 = 0

Solving for variable 'y'.

Begin completing the square.

Move the constant term to the right:

Add '14' to each side of the equation.
-14 + 14y + 14 + y2 = 0 + 14

Reorder the terms:
-14 + 14 + 14y + y2 = 0 + 14

Combine like terms: -14 + 14 = 0
0 + 14y + y2 = 0 + 14
14y + y2 = 0 + 14

Combine like terms: 0 + 14 = 14
14y + y2 = 14

The y term is 14y.  Take half its coefficient (7).
Square it (49) and add it to both sides.

Add '49' to each side of the equation.
14y + 49 + y2 = 14 + 49

Reorder the terms:
49 + 14y + y2 = 14 + 49

Combine like terms: 14 + 49 = 63
49 + 14y + y2 = 63

Factor a perfect square on the left side:
(y + 7)(y + 7) = 63

Calculate the square root of the right side: 7.937253933

Break this problem into two subproblems by setting 
(y + 7) equal to 7.937253933 and -7.937253933.

Subproblem 1

y + 7 = 7.937253933 Simplifying y + 7 = 7.937253933 Reorder the terms: 7 + y = 7.937253933 Solving 7 + y = 7.937253933 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + y = 7.937253933 + -7 Combine like terms: 7 + -7 = 0 0 + y = 7.937253933 + -7 y = 7.937253933 + -7 Combine like terms: 7.937253933 + -7 = 0.937253933 y = 0.937253933 Simplifying y = 0.937253933

Subproblem 2

y + 7 = -7.937253933 Simplifying y + 7 = -7.937253933 Reorder the terms: 7 + y = -7.937253933 Solving 7 + y = -7.937253933 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + y = -7.937253933 + -7 Combine like terms: 7 + -7 = 0 0 + y = -7.937253933 + -7 y = -7.937253933 + -7 Combine like terms: -7.937253933 + -7 = -14.937253933 y = -14.937253933 Simplifying y = -14.937253933

Solution

The solution to the problem is based on the solutions from the subproblems. y = {0.937253933, -14.937253933}

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