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2r + 4 or 2*(r+2)
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2r + 5 - - 1 When simplified: 2r + 6
Solving for r: 16r2+18r+5=0 (2r+1)(8r+5)=0 2r+1=0 and 8r+5=0 2r=-1 .......... 8r=-5 r= -1/2 ........ r= -5/8
(r + 1)(2r + 5)
2r-1=9 2r =10 r =5
9r-1?