if a + b is equal to 3 show that a cube plus b cube + 9 a b is equal to 27
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hii ur answer is
given:a+b=3
to show:a^3+b^3 =27
using formulae
(a+b)^3=a^3+b^3+3ab(a+b)
replacing values
(3)^3=a^3+b^3+3ab(3)
27 =a^3+b^3+9ab
given:a+b=3
to show:a^3+b^3 =27
using formulae
(a+b)^3=a^3+b^3+3ab(a+b)
replacing values
(3)^3=a^3+b^3+3ab(3)
27 =a^3+b^3+9ab
riyu32:
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