r^2+9+81=144

Simple and best practice solution for r^2+9+81=144 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+81=144 equation: 


Simplifying
r2 + 9 + 81 = 144

Reorder the terms:
9 + 81 + r2 = 144

Combine like terms: 9 + 81 = 90
90 + r2 = 144

Solving
90 + r2 = 144

Solving for variable 'r'.

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

Add '-90' to each side of the equation.
90 + -90 + r2 = 144 + -90

Combine like terms: 90 + -90 = 0
0 + r2 = 144 + -90
r2 = 144 + -90

Combine like terms: 144 + -90 = 54
r2 = 54

Simplifying
r2 = 54

Take the square root of each side:
r = {-7.348469228, 7.348469228}

See similar equations:

| 6x^2-12x+11=0 | | x^2+45x+2.5=0 | | (11m+8)-(2m-9)= | | (-5)(-16)= | | -29-14= | | (4y-7)+(-2y-7)= | | -83+(-55)= | | а^2-16b^2/4ab/(1/4b-1/a) | | (x+2)+(7x+1)= | | 2x+181+12=185 | | x^4-6x+4=0 | | 7x+5-6x=11 | | n+8=9-3n | | 7x^3+5x^3= | | 3x+11-8x=13-18x+13x-2 | | -12+32=-4(x+9) | | 2z-9=4z-3 | | 17x-7=11x-13 | | 5xy-7y=1 | | x^2+7x-69=0 | | y=8(2.333333333+y)-7 | | 14x+5-4x+9= | | y-5/8=7/14 | | 4/9n=1/3 | | X+28=45 | | 7a+2-7a= | | 2/3(6x-15)=12 | | x^4-6x^3-8x^2+96x-120=0 | | 7x/20-(5x+4)/4+28/10+(1-x)/4=-1/4 | | 9x^3+8x^3= | | e^2x-1=e^3 | | x/0.7=5 |

Equations solver categories