Answer:
is sometimes positive and sometimes negative.
Step-by-step explanation:
Take
Hence for and for
So is sometimes positive and sometimes negative in the interval.
Its acctually 36 jnioq54hmkdbf
the answer is B) 12a+6b
3+9=12 so 3a+9a=12a,
7-1=6 so 7b-(1)b=6b