Question

Write the value of: 30³+20³-50³.

Answer 1

Answer:

-90,000

Step-by-step explanation:

=(30×30×30)+(20×20×20)-(50×50×50)

=27000+8000-125000

=35000-125000

=-90000

Answer 2

Answer:

We know that 

a3 + b3 + c3 = 3abc, 

if a + b + c = 0

Here 30 + 20 – 50 = 0 

i.e. a + b + c = 0

⇒ (30)3 + (20)3 + (- 50)3

= 3 x (30) x (20) x (- 50)

= – 90000