If it's not what You are looking for type in the equation solver your own equation and let us solve it.
(2r-5)^2=81
We move all terms to the left:
(2r-5)^2-(81)=0
We move all terms containing r to the left, all other terms to the right
(2r-5)^2=81
| 2.5+x=5x-3 | | 16p-12p+5=9 | | -9-(1)=-7y+15y | | 48=3.2d | | y/4+y/3=10/7 | | 3x+10/4+x+24/6=12 | | 2g=2g+2 | | x=4=4x | | 21=6-x-4× | | 18-3a/2=12 | | 2(q+-8)=-10 | | 1/2x°+1/2x°+x°+x°=180° | | C=2.4(m-2)+3 | | 85+z=113 | | (2x+4)+(6x-20)=180 | | 3u+3u-3=9 | | 1/2x°+x°+x°+1/2x°2x=180° | | 10x=8=88 | | 4(r-20)=-16 | | 5(v-3)-4=-3(-8v+5)-9v | | -x/6=2x+312 | | w-(43.7)=3.674 | | 4x-5-7x=8+3x-10 | | x/10=40/50 | | 3(x−4)^2=15 | | 3/8b-2=13 | | 3(x−4)2=15 | | 10-c=12 | | 9.8k-4.3-4.7=26.3 | | 5(3z-4)-2=8 | | 1/2x-5=-4+5/6x | | (2x-18)+4x=180 |