Question

if a+b=11,ab=28.then find the value of a cube+b cube

Answer 1

We have, a + b = 11 and ab = 28

Now, a³ + b³
=> (a + b) (a² - ab + b²)
=> (a + b) {(a + b)² - 2ab - ab}
=> (a + b) {(a + b)² - 3ab}
=> (11) { (11)² - 3(28)}
=> 11 (121 - 84)
=> 11 × 37
=> 407

Hope this helps.....

Answer 2

I hope this is the answer