N^2-21=-20

Simple and best practice solution for N^2-21=-20 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^2-21=-20 equation: 


Simplifying
N2 + -21 = -20

Reorder the terms:
-21 + N2 = -20

Solving
-21 + N2 = -20

Solving for variable 'N'.

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

Add '21' to each side of the equation.
-21 + 21 + N2 = -20 + 21

Combine like terms: -21 + 21 = 0
0 + N2 = -20 + 21
N2 = -20 + 21

Combine like terms: -20 + 21 = 1
N2 = 1

Simplifying
N2 = 1

Take the square root of each side:
N = {-1, 1}

See similar equations:

| 9x+10-10x=28 | | 20-7x=-7(4x+4)+5x | | 4s-5+2(s+3)+s=148 | | 2a-2=9a-10 | | =3x^2+4x-224 | | 3(b+6)+7=-7b+35 | | (9v+5)(4v-12)=0 | | 19x+23y=87 | | X=-0.5x+1 | | -4(8-4)+6= | | 12x+18=-6 | | vq+vx+nq+nx= | | 10+0.05m=22 | | (x+20)+(2x-5)=180 | | y=3(-2y-21) | | X^2-5.9x-.9=0 | | 1+8(x-8)=6-7(x-5) | | 5-2y=4x | | x^5-3x^3+27=0 | | =x^2-3x-10 | | 11x-5=67 | | -.2t^2+5t-17=0 | | 4k+6(4k+7)=18+4k | | 7x+2=82 | | d^3a^2=b^2dc^4 | | 420x-536=336-670x | | c^2+19c+74=c-7 | | (2w-5)+w+(3w-20)=185 | | =x^2-4x-21 | | 210(6)+2(2700)=x | | 10+0.05=22 | | -6+12x=90 |

Equations solver categories