3x^2+6=81

Simple and best practice solution for 3x^2+6=81 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+6=81 equation: 


Simplifying
3x2 + 6 = 81

Reorder the terms:
6 + 3x2 = 81

Solving
6 + 3x2 = 81

Solving for variable 'x'.

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

Add '-6' to each side of the equation.
6 + -6 + 3x2 = 81 + -6

Combine like terms: 6 + -6 = 0
0 + 3x2 = 81 + -6
3x2 = 81 + -6

Combine like terms: 81 + -6 = 75
3x2 = 75

Divide each side by '3'.
x2 = 25

Simplifying
x2 = 25

Take the square root of each side:
x = {-5, 5}

See similar equations:

| X^4-3X^3+11X^2-27X+18=0 | | x^2-25x+27=0 | | x^2+25x+23=0 | | 5x-30+4=7x+14-10 | | 48x+20=6(7x+4)+6x-4 | | x^2+-10x+23=0 | | x^2-10x-23=0 | | x^2+10x-23=0 | | m^2+6m+2=0 | | -5(2x-6)+5=-10x+35 | | 0.10(y-4)+0.12y=0.2y-1.5 | | 7+4(3)=1 | | 8(x+9)+3=75 | | 7+4(-3)=1 | | x^2-4x+49=0 | | 4x^2-5x=3 | | x^2-4x+41=0 | | x^2-4x-41=0 | | x^2+4x-41=0 | | 5(2m+5)=65 | | 2*9=6*x | | 13=5+3b-23 | | 24*32= | | 5X^2-31x+30=0 | | 3*15=x*9 | | 1000xq=7.4672 | | x*12=9*16 | | -5-x=2x+3 | | 12*9= | | x*14=4*7 | | 6x^2+26x+20=0 | | 12+x=2x-7 |

Equations solver categories