3r^2-39+90=0

Simple and best practice solution for 3r^2-39+90=0 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 3r^2-39+90=0 equation:


Simplifying
3r2 + -39 + 90 = 0

Reorder the terms:
-39 + 90 + 3r2 = 0

Combine like terms: -39 + 90 = 51
51 + 3r2 = 0

Solving
51 + 3r2 = 0

Solving for variable 'r'.

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

Add '-51' to each side of the equation.
51 + -51 + 3r2 = 0 + -51

Combine like terms: 51 + -51 = 0
0 + 3r2 = 0 + -51
3r2 = 0 + -51

Combine like terms: 0 + -51 = -51
3r2 = -51

Divide each side by '3'.
r2 = -17

Simplifying
r2 = -17

Reorder the terms:
17 + r2 = -17 + 17

Combine like terms: -17 + 17 = 0
17 + r2 = 0

The solution to this equation could not be determined.

See similar equations:

| x^4+6x^2=27 | | solvex^4+6x^2=27 | | 4(5x+5)=2(7x+6) | | 1.3y-2.7=0.5y+3.78 | | 2h^2-5h=12 | | 76x+32y=1 | | x-3=x+1 | | 5x-1=64 | | 8-10x=213-45x | | -10+t=-12 | | 163-5x=6x+20 | | 2m+6=2m+5 | | -2(y-3)=4(y+3) | | 2m+-6=7 | | 4/2=x | | 4x^2-15x+13=-3x+8 | | 8x^2-5x-7=2 | | 6x^2+25=-25x | | 2w+1=w | | 10h+8=10 | | 5x+10=2x+10 | | 51-4x=14x+17 | | 222-7x=38x+17 | | x^2+6x=x+14 | | 8-9x=108-37x | | 115-5x=5x+11 | | -3+4x^2=2 | | -137-10x=7x+16 | | 2b^2-9=12b | | 3x^2-x^2=10 | | (x+2)(2x+5)=36 | | 9x^4-8x^2-1=0 |

Equations solver categories