y^2+4y-176=0

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Solution for y^2+4y-176=0 equation:


Simplifying
y2 + 4y + -176 = 0

Reorder the terms:
-176 + 4y + y2 = 0

Solving
-176 + 4y + y2 = 0

Solving for variable 'y'.

Begin completing the square.

Move the constant term to the right:

Add '176' to each side of the equation.
-176 + 4y + 176 + y2 = 0 + 176

Reorder the terms:
-176 + 176 + 4y + y2 = 0 + 176

Combine like terms: -176 + 176 = 0
0 + 4y + y2 = 0 + 176
4y + y2 = 0 + 176

Combine like terms: 0 + 176 = 176
4y + y2 = 176

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 = 176 + 4

Reorder the terms:
4 + 4y + y2 = 176 + 4

Combine like terms: 176 + 4 = 180
4 + 4y + y2 = 180

Factor a perfect square on the left side:
(y + 2)(y + 2) = 180

Calculate the square root of the right side: 13.416407865

Break this problem into two subproblems by setting 
(y + 2) equal to 13.416407865 and -13.416407865.

Subproblem 1

y + 2 = 13.416407865 Simplifying y + 2 = 13.416407865 Reorder the terms: 2 + y = 13.416407865 Solving 2 + y = 13.416407865 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 = 13.416407865 + -2 Combine like terms: 2 + -2 = 0 0 + y = 13.416407865 + -2 y = 13.416407865 + -2 Combine like terms: 13.416407865 + -2 = 11.416407865 y = 11.416407865 Simplifying y = 11.416407865

Subproblem 2

y + 2 = -13.416407865 Simplifying y + 2 = -13.416407865 Reorder the terms: 2 + y = -13.416407865 Solving 2 + y = -13.416407865 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 = -13.416407865 + -2 Combine like terms: 2 + -2 = 0 0 + y = -13.416407865 + -2 y = -13.416407865 + -2 Combine like terms: -13.416407865 + -2 = -15.416407865 y = -15.416407865 Simplifying y = -15.416407865

Solution

The solution to the problem is based on the solutions from the subproblems. y = {11.416407865, -15.416407865}

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