y^2+4y-14=0

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Solution for y^2+4y-14=0 equation:


Simplifying
y2 + 4y + -14 = 0

Reorder the terms:
-14 + 4y + y2 = 0

Solving
-14 + 4y + 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 + 4y + 14 + y2 = 0 + 14

Reorder the terms:
-14 + 14 + 4y + y2 = 0 + 14

Combine like terms: -14 + 14 = 0
0 + 4y + y2 = 0 + 14
4y + y2 = 0 + 14

Combine like terms: 0 + 14 = 14
4y + y2 = 14

The y term is 4y.  Take half its coefficient (2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
4y + 4 + y2 = 14 + 4

Reorder the terms:
4 + 4y + y2 = 14 + 4

Combine like terms: 14 + 4 = 18
4 + 4y + y2 = 18

Factor a perfect square on the left side:
(y + 2)(y + 2) = 18

Calculate the square root of the right side: 4.242640687

Break this problem into two subproblems by setting 
(y + 2) equal to 4.242640687 and -4.242640687.

Subproblem 1

y + 2 = 4.242640687 Simplifying y + 2 = 4.242640687 Reorder the terms: 2 + y = 4.242640687 Solving 2 + y = 4.242640687 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + y = 4.242640687 + -2 Combine like terms: 2 + -2 = 0 0 + y = 4.242640687 + -2 y = 4.242640687 + -2 Combine like terms: 4.242640687 + -2 = 2.242640687 y = 2.242640687 Simplifying y = 2.242640687

Subproblem 2

y + 2 = -4.242640687 Simplifying y + 2 = -4.242640687 Reorder the terms: 2 + y = -4.242640687 Solving 2 + y = -4.242640687 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + y = -4.242640687 + -2 Combine like terms: 2 + -2 = 0 0 + y = -4.242640687 + -2 y = -4.242640687 + -2 Combine like terms: -4.242640687 + -2 = -6.242640687 y = -6.242640687 Simplifying y = -6.242640687

Solution

The solution to the problem is based on the solutions from the subproblems. y = {2.242640687, -6.242640687}

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