(r1+r2)^2-(1.5-r1-r2)^2-(1-r1-r2)^2=0

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(r1+r2)^2-(1.5-r1-r2)^2-(1-r1-r2)^2=0(r1+r2)^2-(1.5-r1-r2)^2-(1-r1-r2)^2=0(r1+r2)^2-(1.5-r1-r2)^2-(1

(r1+r2)^2-(1.5-r1-r2)^2-(1-r1-r2)^2=0
(r1+r2)^2-(1.5-r1-r2)^2-(1-r1-r2)^2=0

(r1+r2)^2-(1.5-r1-r2)^2-(1-r1-r2)^2=0
(r1+r2)^2-(1.5-r1-r2)^2-(1-r1-r2)^2=0
(r1+r2)^2-1.5^2+2*1.5(r1+r2)-(r1+r2)^2-1+2(r1+r2)-(r1+r2)^2=0
-3.25+5(r1+r2)-(r1+r2)^2=0
(r1+r2)^2-5(r1+r2)+3.25=0
4(r1+r2)^2-20(r1+r2)+13=0