Question

find the product [2a+5b] [4a^2 - 10ab -25^b2]

Answer 1

Answer:

using identity

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

hence answer is

8a^3-125b^3

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Answer 2

Answer:

8a³ + 125b³

Step-by-step explanation:

Using, a³ + b³ = (a + b) (a² - ab + b²)

= (2a + 5b) [ (2a)² - 2a × 5b + (5b)² ]

= (2a)³ + (5b)³

= 8a³ + 125³

Hope this helps you