a2=18

Simple and best practice solution for a2=18 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 a2=18 equation:



a2=18
We move all terms to the left:
a2-(18)=0
We add all the numbers together, and all the variables
a^2-18=0
a = 1; b = 0; c = -18;
Δ = b2-4ac
Δ = 02-4·1·(-18)
Δ = 72
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$a_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$a_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

The end solution:
$\sqrt{\Delta}=\sqrt{72}=\sqrt{36*2}=\sqrt{36}*\sqrt{2}=6\sqrt{2}$
$a_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-6\sqrt{2}}{2*1}=\frac{0-6\sqrt{2}}{2} =-\frac{6\sqrt{2}}{2} =-3\sqrt{2} $
$a_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+6\sqrt{2}}{2*1}=\frac{0+6\sqrt{2}}{2} =\frac{6\sqrt{2}}{2} =3\sqrt{2} $

See similar equations:

| 18) 5n-5=n+10 | | |(3x-3)/4|=6 | | 17) 9n+1=6n+9 | | 16) 6n+5=4n+18 | | 3(x+17)+15=7x-1 | | 5(m+4)=3(2m+1) | | 15) 3n+3=2n+8 | | (15g+3)+3g=180 | | 9p-9+9-2p=7p-0 | | 10) 5n-10=3n+50 | | 3|x|−6=15 | | 9) 11n-9=5n+27 | | 5) 6n+8=2n+36 | | 33+7y-23=180 | | 71-2x=35-x | | 4(2x-3)=104 | | 9s-3+9-9s=0s+6 | | 16x+5×8^x=0 | | -2x-1/3=x+4/2 | | x=(x+4)(x−4)+16 | | 1300/35=36/7s | | 3.4-x-2.x-1=x+20 | | 2(m-4)=m+12 | | 100b^2-4=0 | | 18x1/2x=6(3x+25) | | 2m-3(m-1)=4(m+3) | | 17=5y+35 | | 7x+2=4(3x+8)-8x | | 9+6y-9-5y=1y-4 | | 9m+3-3m=6m+3 | | X-5=-3y | | 5s-3s+9+3s=5s+9 |

Equations solver categories