If (a+b)=6 and a b=8, then (a^{3}+b^{3} ) is equal to:

SSC CGL 12 Jun 2019 Shift 1 Paper

Question : 57 of 100

Marks: +1, -0

(a+b)=6

and

a b=8,

then

\ (a^{3}+b^{3}\ )

is equal to:

Solution:

a+b=6

a b=8

put,

a=2, b=4

a^{3}+b^{3}=8+64=72

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