Q. 5 E4.2( 4 Votes )

Find the product of the following :

(m – n) (m2 + mn + n2)

Answer :

m(m2 + mn + n2) -n(m2 + mn + n2)


(m× m2 + m× mn + mn2) –( nm2 + n× mn + n× n2)


(m2 + 1 + m1 + 1n + mn2) –( nm2 + mn1 + 1 + n2 + 1)


( an + m = an × am)


(m3 + m2n + mn2) –( nm2 + mn2 + n3)


m3 + m2n + mn2 – nm2 - mn2 - n3


m3 + m2n– m2n + mn2 - mn2 - n3


m3 + (1-1)m2n + (1-1)mn2 - n3


= m3 - n3


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