Question

if the sum and product of two number are 7 and 47 by 4 respectively find the sum of their cubes​

Answer 1

Answer:

Let m and n be the two numbers. Then:

m+n=8 and

mn=15

Also:

a³+b³=(a+b)³-3 ab(a + b)

So

m³+n³=(8)³-3(15)(8)

=512–360

=152