Question

A*B=100 A-B=298.98 则,A和B分别是多少

Answer 1

A*B=100 A-B=298.98

(B+298.98)B=100

B^2+298.98B-100=0

B=-298.98+√298.98^2+4*100/2=-149.49+149.82=0.33

或B=-298.98-√298.98^2+4*100/2=-149.49-149.82=-299.31

(1) B=0.33 A=299.31

(2) B=-299.31 A=0.33