Question

factorise 125x³- 343y³​

Answer 1

Answer:

(5x - 7y) (25x² + 35xy + 49y²)

Step-by-step explanation:

>> 125x³- 343y³

>> (5x)³ - (7y)³

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

>> (5x - 7y) [ (5x)² + 5x * 7y + (7y)²]

>> (5x - 7y) (25x² + 35xy + 49y²)

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Answer 2

Answer:

(5x-7y)(25x^2+35xy+49y^2)

Step-by-step explanation:

The question is of the form a^3-b^3 where it is (a-b)(a^2+ab+b^2).

Using this formula here we get

(5x)^3-(7y)^3=(5x-7y)(25x^2+35xy+49y^2)..

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