Question

(5m^3 + 9) (5m^3 -9)​

Answer 1

Answer:

25m∧6 - 81

Step-by-step explanation:

This expression is of the form (a+b) * (a-b). Where a=5m^3 and b=9.

So the answer to this expression is a^2 - b^2 , i.e. (5m^3)^2 - (9)^2.

Answer 2

Answer:

( 5m³ + 9 )( 5m³ - 9)

= ( 5m³ )² - 9²                  [a² - b² = (a+b)(a-b) ]

= 25m^6 - 81

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