Question

Evaluate using suitable identities 5 cube + 4 cube
Plz answer fast...

Answer 1

Answer:

189

Step-by-step explanation:

a^3 + b^3 = (a+b)^3 - 3ab(a+b) {By using identity (a+b)^3 = a^3 + b^3 + 3ab(a+b)}

Here a=5 & b=4

5^3 + 4^3 = (5+4)^3 - 3(5)(4)(5+4)

= 729 - 540

= 189