Question

Evaluate (120)^3 by using suitable identit​

Answer 1

Explanation:

120=(100 + 20)

120^3=(100+20)^3

(a+b)^3=a^3+3a^2b+3ab^2+b^3.

(100+20)^3=100^2+3×100^2×20+3×100×20^2+20^3

(100+20)^3=1000000+600000+120000+8000

=1728000.

Answer 2

Answer:

(a+b)^3= a^3 + b^3+3a^2b+3ab^2

Explanation:(100+20)^3