n^2+8n=-3

Simple and best practice solution for n^2+8n=-3 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 n^2+8n=-3 equation:


Simplifying
n2 + 8n = -3

Reorder the terms:
8n + n2 = -3

Solving
8n + n2 = -3

Solving for variable 'n'.

Reorder the terms:
3 + 8n + n2 = -3 + 3

Combine like terms: -3 + 3 = 0
3 + 8n + n2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-3' to each side of the equation.
3 + 8n + -3 + n2 = 0 + -3

Reorder the terms:
3 + -3 + 8n + n2 = 0 + -3

Combine like terms: 3 + -3 = 0
0 + 8n + n2 = 0 + -3
8n + n2 = 0 + -3

Combine like terms: 0 + -3 = -3
8n + n2 = -3

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

Add '16' to each side of the equation.
8n + 16 + n2 = -3 + 16

Reorder the terms:
16 + 8n + n2 = -3 + 16

Combine like terms: -3 + 16 = 13
16 + 8n + n2 = 13

Factor a perfect square on the left side:
(n + 4)(n + 4) = 13

Calculate the square root of the right side: 3.605551275

Break this problem into two subproblems by setting 
(n + 4) equal to 3.605551275 and -3.605551275.

Subproblem 1

n + 4 = 3.605551275 Simplifying n + 4 = 3.605551275 Reorder the terms: 4 + n = 3.605551275 Solving 4 + n = 3.605551275 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + n = 3.605551275 + -4 Combine like terms: 4 + -4 = 0 0 + n = 3.605551275 + -4 n = 3.605551275 + -4 Combine like terms: 3.605551275 + -4 = -0.394448725 n = -0.394448725 Simplifying n = -0.394448725

Subproblem 2

n + 4 = -3.605551275 Simplifying n + 4 = -3.605551275 Reorder the terms: 4 + n = -3.605551275 Solving 4 + n = -3.605551275 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + n = -3.605551275 + -4 Combine like terms: 4 + -4 = 0 0 + n = -3.605551275 + -4 n = -3.605551275 + -4 Combine like terms: -3.605551275 + -4 = -7.605551275 n = -7.605551275 Simplifying n = -7.605551275

Solution

The solution to the problem is based on the solutions from the subproblems. n = {-0.394448725, -7.605551275}

See similar equations:

| 6(8+n)=40+5n | | 2x-1y+32z= | | 11=-5-x | | 5x+4x(x-3)=(2x+6)(2x-6)+17x | | 5v+9=94 | | -6x-(-4x-6)=27+x | | 4.5=3(4.5) | | 7x+4yi=13+16i | | 5x=7/5 | | X(4.5)=1.5 | | 3x+2y-5z= | | 18+3x=3x | | 3(4k+8)-8=28+8k | | -2/5-(-1/15) | | 3x+2y-5z=-1 | | 1+5x=2+6x | | 77x+55-29292929=100 | | 2*ln(x)+1=0 | | 6x(5x+15)=90 | | Y+3y=18 | | -8-3a=2(-1-3a)+2a | | 12.85-8.5(6.3-x)=x+4.3 | | (5x+2)=57 | | 9a^5b^7-12a^3b^10=0 | | 32-a=-64 | | 4(3z-2)+8=34 | | 5(5-5b)=25-8b | | 0.6/0.15 | | -5x+3=1-3x | | x^2-3x+87=0 | | 5x+1=4x+1+x | | 12-6n=n+5 |

Equations solver categories