8n^2-9=-21

Simple and best practice solution for 8n^2-9=-21 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 8n^2-9=-21 equation:


Simplifying
8n2 + -9 = -21

Reorder the terms:
-9 + 8n2 = -21

Solving
-9 + 8n2 = -21

Solving for variable 'n'.

Move all terms containing n to the left, all other terms to the right.

Add '9' to each side of the equation.
-9 + 9 + 8n2 = -21 + 9

Combine like terms: -9 + 9 = 0
0 + 8n2 = -21 + 9
8n2 = -21 + 9

Combine like terms: -21 + 9 = -12
8n2 = -12

Divide each side by '8'.
n2 = -1.5

Simplifying
n2 = -1.5

Reorder the terms:
1.5 + n2 = -1.5 + 1.5

Combine like terms: -1.5 + 1.5 = 0.0
1.5 + n2 = 0.0

The solution to this equation could not be determined.

See similar equations:

| (5x-4)(4x-5)=0 | | -4/5t | | 66/x=3/2 | | 2x+12+18y= | | .08x-.05y=0 | | C-4+a=a | | 10-10x^4=0 | | 10-10x^5=0 | | Mx=11.6M | | Mx=11.6 | | 6x-10+4=6+4-9x | | 6-9x-2=-72+6x-14 | | 4x-5=1-3x | | -3a-1/2=1 | | 2s=1/2=1/2 | | -3x^2-72x=0 | | 2x-(3-x)+5x+3=8x+2 | | 3Tan^2x+5secx+1=0 | | Tan^2x+5secx+1=0 | | x^2+2x+9=16 | | 2/3k6 | | 5x+1=-3-2x-8 | | 17=m-8 | | d/3x | | 4n-7+n=8 | | ab=2fora | | 5-3(5-2x)=2(x-1) | | 14x+11=14x+2x | | -m+4=1 | | x+.13x=20 | | 2=-2-n | | r+(-12)=9 |

Equations solver categories