r^2+9=90

Simple and best practice solution for r^2+9=90 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 r^2+9=90 equation: 


Simplifying
r2 + 9 = 90

Reorder the terms:
9 + r2 = 90

Solving
9 + r2 = 90

Solving for variable 'r'.

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

Add '-9' to each side of the equation.
9 + -9 + r2 = 90 + -9

Combine like terms: 9 + -9 = 0
0 + r2 = 90 + -9
r2 = 90 + -9

Combine like terms: 90 + -9 = 81
r2 = 81

Simplifying
r2 = 81

Take the square root of each side:
r = {-9, 9}

See similar equations:

| 5(2x+7)=-32+37 | | 15x+12y(-4.5x+74.75)= | | sin(x)=0.4856 | | x+10+y=0 | | 60+20x=123 | | 2j+4=8 | | 2x+40=10 | | .1+.01+.25(35-2x)=3.29 | | sinb=.4848 | | 2k-8-7k=21 | | 2(4x+7)=-16+6 | | -x-9y=-1 | | 3x+(2-4)x=5 | | -2x+5+2x-5=1+(-1)6x+2 | | 8+9=12 | | 7x(x+21)=0 | | 20f=89 | | 0.003x-0.2=0.09 | | 2(n-5)-or=-7 | | e+10.6=11.10 | | 10=4+2h | | 5y+125=5(5y+5) | | -.75y=33.3x+12 | | 2w+2=6 | | x+600=6y | | (2a^2b)(3b^3)=0 | | .8x=9 | | 8(4a+6)=22 | | (x+2)*squared=64 | | 7b-.4=6b-1.4 | | 8b-4=20 | | (8a+3)(5a-15)=0 |

Equations solver categories