Question

Factorise using suitable identities
125 m³ − 343
pls answer me very urgent ​

Answer 1

Answer:

125 m³ − 343

= (5m)³ - (7)³

Identity: a³ - b³ = (a – b) ( $a^{2}$ + ab + $b^{2}$  )

= (5m - 7) ($(5m)^{2}$ + (5a×7) + $7^{2}$)

= (5m - 7) ($25m^{2}$ +  35a + $7^{2}$)

Answer 2

Answer:

actually you question is a bit wrong it should be 125x³-343y³

Step-by-step explanation:

the answer is

125x³ can be written as (5x)³

343y³ can be written as (7x)³

using identity VII

(a-b)(a²+ab+b²)

substituting values ,

(5x-7y) [(5x)²+5x*7y+(7y)²]

(5x-7y) [25x²+35xy+49y²]