4r^2-9=0

Simple and best practice solution for 4r^2-9=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 4r^2-9=0 equation: 


Simplifying
4r2 + -9 = 0

Reorder the terms:
-9 + 4r2 = 0

Solving
-9 + 4r2 = 0

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 + 4r2 = 0 + 9

Combine like terms: -9 + 9 = 0
0 + 4r2 = 0 + 9
4r2 = 0 + 9

Combine like terms: 0 + 9 = 9
4r2 = 9

Divide each side by '4'.
r2 = 2.25

Simplifying
r2 = 2.25

Take the square root of each side:
r = {-1.5, 1.5}

See similar equations:

| 3(2n+2)= | | 4r^2-9r=0 | | 4(n-3)=8 | | 3(n+2)=-15 | | x^4-6x^2+9=27 | | 49x^3-x=0 | | 2(n+2)=-4 | | 2y-2=10 | | 4(n-4)=12 | | -51=17y | | 4x^6-9r^4=0 | | 2(n+4)=8 | | 6a+7-9=-18 | | 177=-t+55 | | 3(n+2)=9 | | x(7x-5)=12 | | 8n=7n+22 | | 8x^2-6x+6=0 | | x^2=-25 | | -18=8x-9-5y | | 1-6x=4-x | | 2.4+24=6.4m | | 33-y=7 | | 3x+5x=88 | | 7y+7=6y-5 | | 3x-2x-4=7 | | 2x+5=25-3x | | 4(3-2x)-5(4x-9)=13(2x-5)-4 | | 3(4+2)+9=13+5f | | 11p+-33=5p+15 | | 9y+5-4y+6=1 | | -17n-9n+21n=10 |

Equations solver categories