7r^2+28=0

Simple and best practice solution for 7r^2+28=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 7r^2+28=0 equation:


Simplifying
7r2 + 28 = 0

Reorder the terms:
28 + 7r2 = 0

Solving
28 + 7r2 = 0

Solving for variable 'r'.

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

Add '-28' to each side of the equation.
28 + -28 + 7r2 = 0 + -28

Combine like terms: 28 + -28 = 0
0 + 7r2 = 0 + -28
7r2 = 0 + -28

Combine like terms: 0 + -28 = -28
7r2 = -28

Divide each side by '7'.
r2 = -4

Simplifying
r2 = -4

Reorder the terms:
4 + r2 = -4 + 4

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

The solution to this equation could not be determined.

See similar equations:

| X-(5-2x)-(4x-11)=5x-13 | | 3(1-6k)+4= | | 24-2(b-3)+8= | | -5x^2+50x-127=0 | | -7y=21-9x | | -7-3(1+2c)=21 | | -7y-2=10 | | log(4)(3x+2)=log(4)5-log(4)3 | | -7-2p=10 | | 9p+4=58 | | h(x)=x^3-5x^2+4x+6 | | 2y+x=10+x | | x^2+y^2+4y+4=0 | | 16=5x+1 | | 3x-5x=4-6 | | (-5x-5)+4x+4=-5x+11 | | In(0.32x+2)=0.8 | | -x+2y+4=0 | | 3=30 | | 2x+2=1x+3 | | 46+5y-4=15y-14-2y | | s^2+11s+24= | | 2x+3=1x+3 | | 4(2x)=31 | | (1-y)(3y-7)=0 | | 2+4x=31 | | 3x-47=2x-21 | | 8=10x+8 | | 225*3.50= | | x^2+y^2+3y-2x+2=0 | | 4f-3=2f+7 | | p/2-2= |

Equations solver categories