|x−3|−|x+1|/2∗|x+1|=1|x−3|−|x+1|2∗|x+1|=1|x−3|−|x+1|∗|x+1|2=1|x−3|−(x+1)22=1|x−3|=1+(x+1)22|x−3|=x2+2x+32x−3=x2+2x+32orx−3=−x2+2x+322x−6=x2+2x+3or2x−6=−x2−2x−30=x2+9or0=−x2−4x+3x2=−9orx=4±√16+12−2
x2=−9orx=4±√4∗7−2x2=−9orx=4±2√7−2x2=−9orx=2±√7−1x2=−9orx=−2±√7x=±√−9orx=−2+√7orx=−2−√7$Soitappearsthattheonlyrealrootsare$x=−2+√7orx=−2−√7
.|x−3|−|x+1|/2∗|x+1|=1|x−3|−|x+1|2∗|x+1|=1|x−3|−|x+1|∗|x+1|2=1|x−3|−(x+1)22=1|x−3|=1+(x+1)22|x−3|=x2+2x+32x−3=x2+2x+32orx−3=−x2+2x+322x−6=x2+2x+3or2x−6=−x2−2x−30=x2+9or0=−x2−4x+3x2=−9orx=4±√16+12−2
x2=−9orx=4±√4∗7−2x2=−9orx=4±2√7−2x2=−9orx=2±√7−1x2=−9orx=−2±√7x=±√−9orx=−2+√7orx=−2−√7$Soitappearsthattheonlyrealrootsare$x=−2+√7orx=−2−√7