Question

Ifa-b=7 , ab=18 then a^3 - b^3= ?

Answer 1

Answer:

Step-by-step explanation:

a-b=7

ab=18

(a+b)²=49+72=121

(a+b)²=a²+b²+2ab⇒121²=a²+b²+36⇒a²+b²=14641-36=14605

a³-b³=(a-b)(a²+ab+b²)=7(14605+18)=102361

Answer 2

Answer:

This is the answer.

Hope this helps you.