\(a)\left(+5\right).\left(+6\right)=30\\ b)\left(+5\right).\left(-6\right)=-30.\)
a) \(\left(+5\right).\left(+6\right)=30\)
\(\left(-5\right).\left(-6\right)=30\)
b) \(\left(-5\right).\left(+6\right)=-30\)
\(\left(+5\right).\left(-6\right)=30\)
a) (+5).(+6)=30(+5).(+6)=30
(−5).(−6)=30(−5).(−6)=30
b) (−5).(+6)=−30(−5).(+6)=−30
(+5).(−6)=30