Question

please solve this question

Second part only

Answer 1

Hello friend this is your answer =_=

Answer 2

(3b + 2 )(5b―4)―(b―5)(3b+2)
=[3b(5b―4)+2(5b―4)]―[b(3b+2)―5(3b+2)]
=[15b sq. ―12b+10b―8]―[3b sq. +2b―15b―10]
=15b sq. ―12b+10b―8―3b sq. ―2b+15b+10
=15b sq.―3b sq. ―12b+10b―2b+15b―8+10
=12b sq. + 11b ―2