0

Guest

Courses New

a^3-b^3=56 and ab=8 then what is the value of a-b. ?

a^3-b^3=56 and ab=8 then what is the value of a-b. ?

Grade:10

1 Answers

Arun
25750 Points
6 years ago
Dear Amar
 
We have to find (a-b)
Now
(a-b)³ = a³ -b³ -3ab(a-b)
(a-b)³ = 56 -24 (a-b)
It is like 
x³ +24x -56 = 0
x = 2 it is true
Hence
a -b = 2
 
Regards
Arun (askIITians forum expert)

Think You Can Provide A Better Answer ?

Other Related Questions on Algebra

View all Questions »

ASK QUESTION

Get your questions answered by the expert for free

Answer and earn gift vouchers

Win Gift vouchers upto Rs 500/-

View courses by askIITians

Design classes One-on-One in your own way with Top IITians/Medical Professionals

Click Here Know More

Complete Self Study Package designed by Industry Leading Experts

Click Here Know More

Live 1-1 coding classes to unleash the Creator in your Child

Click Here Know More

a Complete All-in-One Study package Fully Loaded inside a Tablet!

Click Here Know More