b) B = 2 + căn bậc hai 3/ căn bậc hai 7 - 4 căn bậc hai 3 - 2 - căn bậc hai 3/ căn bậc hai 7 + 4 căn bậc hai 3
Giải thích
b) B=2+37−43−2−37+43=2+32−32−2−32+32=2+32−3−2−32+3
=2+322−32+3−2−322+32−3=2+32−2−32=2+3+2−32+3−2+3=4.23=83Vậy B=83
b) B=2+37−43−2−37+43=2+32−32−2−32+32=2+32−3−2−32+3
=2+322−32+3−2−322+32−3=2+32−2−32=2+3+2−32+3−2+3=4.23=83Vậy B=83