Question

if a-b=2 and ab=3, find a³-b³​

Answer 1

Answer:

we have,

a-b=2. and ab=3

then, a³-b³=?

we know that

(a-b)³= a³-b³-3ab(a-b)

so, a³-b³= (a-b)³+3ab(a-b)

= (2)³+ 3×3×2

= 8+18= 26

Answer 2

Answer:-

we know that : a³- b³= (a-b)³+3ab(a-b)

put the value of ; a-b =3 and ab = 2

a³-b³= 3³+3 ×2×3

a³-b³= 27 + 18 =45

a³-b³= 45

I hope this helps you.....!!!!!!!!!!

Thanks.....!!!!!!!