(2x+18.5*2+1)*(2x+26)=1260 x=?(2x+18.5*2+1)*(2x+26)=1260x=?
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(2x+18.5*2+1)*(2x+26)=1260x=?(2x+18.5*2+1)*(2x+26)=1260x=?(2x+18.5*2+1)*(2x+26)=1260x=?(2x+18.5*2+1)
(2x+18.5*2+1)*(2x+26)=1260 x=?(2x+18.5*2+1)*(2x+26)=1260x=?
(2x+18.5*2+1)*(2x+26)=1260 x=?
(2x+18.5*2+1)*(2x+26)=1260
x=?
(2x+18.5*2+1)*(2x+26)=1260 x=?(2x+18.5*2+1)*(2x+26)=1260x=?
(2x+18.5*2+1)*(2x+26)=1260
(2x+38)(2x+26)=1260
(x+19)(x+13)=315
x²+32x+19×13-315=0
x²+32x-68=0
(x+34)(x-2)=0
∴x=-34,x=2
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