3x^2+8=20

Simple and best practice solution for 3x^2+8=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 3x^2+8=20 equation:


Simplifying
3x2 + 8 = 20

Reorder the terms:
8 + 3x2 = 20

Solving
8 + 3x2 = 20

Solving for variable 'x'.

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

Add '-8' to each side of the equation.
8 + -8 + 3x2 = 20 + -8

Combine like terms: 8 + -8 = 0
0 + 3x2 = 20 + -8
3x2 = 20 + -8

Combine like terms: 20 + -8 = 12
3x2 = 12

Divide each side by '3'.
x2 = 4

Simplifying
x2 = 4

Take the square root of each side:
x = {-2, 2}

See similar equations:

| 30-8t=2+10t | | 16x^2-8x-47=0 | | -11=w-14 | | (3x+4)(x-8)=0 | | x(2x^2-4x)=0 | | 3x+2(x-10)=5(x-4) | | n^2=15+2n | | 4x-3=64 | | p^2+1=2p | | 2x-4=2(x-3) | | -11w^2=-(10w-8) | | 6z-18=90 | | -26+20w=-106 | | 7x-y=26 | | 2b^2+6=18 | | 3v=33 | | 15x+83=-7 | | logx+6=2 | | s^2+12s-12=14 | | 7-2k^2=-13 | | 6u-18=12 | | 2x^2-4+1=0 | | 2w+3=-11 | | 7x-9=2x+1 | | -4n-40=7(-2n+2) | | 9k^2+10=91 | | 0.18t=(0.18t+1)t-0.18*0.18t | | 2m^2-9=-15 | | x*2-x+9=0 | | (-3)(-2)(-4)= | | 3w-18=0 | | t^2+5t-2=0 |

Equations solver categories