Answer :

Given problem asks to subtract

(i) –2xy + 3xy2 from 8xy


8xy ( –2xy + 3xy2 )


8xy +2xy –3xy2


10xy –3xy2


(ii) a – b – 2c from 4a + 6b – 2c


4a +6b –2c – (a– b – 2c)


4a +6b –2c –a + 2c +b


While adding or subtracting, the like term`s numerical coefficient are added or subtracted


(4–1) a + (6 +1) b +( –2 +2) c


3a +7b


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