y^2+8y=-6

Simple and best practice solution for y^2+8y=-6 equation. Check how easy it is, and learn it for the future. Our solution is simple, and easy to understand, so don`t hesitate to use it as a solution of your homework.

If it's not what You are looking for type in the equation solver your own equation and let us solve it.

Solution for y^2+8y=-6 equation:


Simplifying
y2 + 8y = -6

Reorder the terms:
8y + y2 = -6

Solving
8y + y2 = -6

Solving for variable 'y'.

Reorder the terms:
6 + 8y + y2 = -6 + 6

Combine like terms: -6 + 6 = 0
6 + 8y + y2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-6' to each side of the equation.
6 + 8y + -6 + y2 = 0 + -6

Reorder the terms:
6 + -6 + 8y + y2 = 0 + -6

Combine like terms: 6 + -6 = 0
0 + 8y + y2 = 0 + -6
8y + y2 = 0 + -6

Combine like terms: 0 + -6 = -6
8y + y2 = -6

The y term is 8y.  Take half its coefficient (4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
8y + 16 + y2 = -6 + 16

Reorder the terms:
16 + 8y + y2 = -6 + 16

Combine like terms: -6 + 16 = 10
16 + 8y + y2 = 10

Factor a perfect square on the left side:
(y + 4)(y + 4) = 10

Calculate the square root of the right side: 3.16227766

Break this problem into two subproblems by setting 
(y + 4) equal to 3.16227766 and -3.16227766.

Subproblem 1

y + 4 = 3.16227766 Simplifying y + 4 = 3.16227766 Reorder the terms: 4 + y = 3.16227766 Solving 4 + y = 3.16227766 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + y = 3.16227766 + -4 Combine like terms: 4 + -4 = 0 0 + y = 3.16227766 + -4 y = 3.16227766 + -4 Combine like terms: 3.16227766 + -4 = -0.83772234 y = -0.83772234 Simplifying y = -0.83772234

Subproblem 2

y + 4 = -3.16227766 Simplifying y + 4 = -3.16227766 Reorder the terms: 4 + y = -3.16227766 Solving 4 + y = -3.16227766 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + y = -3.16227766 + -4 Combine like terms: 4 + -4 = 0 0 + y = -3.16227766 + -4 y = -3.16227766 + -4 Combine like terms: -3.16227766 + -4 = -7.16227766 y = -7.16227766 Simplifying y = -7.16227766

Solution

The solution to the problem is based on the solutions from the subproblems. y = {-0.83772234, -7.16227766}

See similar equations:

| 24x^8= | | 9x+18=63 | | 9x+9=29 | | 9x+10=30 | | 3x+15=25 | | y+5=-2y | | 3x+25=10 | | 64x*4y=54xy | | x^2=-14-40 | | -3a(a+4b)= | | x*y-3=0 | | k/2=-11/2 | | 4x^2+43x-108=0 | | 126=-18a | | (3a+4b)+(-3a+3b)= | | x=-3+2t | | d=1/2(c+4) | | d=2c+8/2 | | 4x^5+28x^4+48x^3=0 | | f(x)=5x^2-5x | | 3x^6-9x^5=30x^4 | | h(t)=-16t^2+38 | | 3n+2=n-8 | | h=-3t^2+20t | | 7-5x=3x | | h=-3t+20t | | -x^5+6x^4-8x^3=0 | | -4t-3=-37 | | x^2+3t=-1 | | t-(-48)=31 | | 5j-3=3j+11 | | 10(r+4)-16=-3(r+3)+2r |

Equations solver categories