Question

Doubt ->
Factorise the polynomial: 8x^3 - y^3

Please help me

Answer 1

HEYA USER ❤️

8x³-y³

we can write 8x³ as (2x)³ and y³ as (y)³

By using a³-b³=(a-b)(a²+b²+ab)

So,(2x)³-(y)³=(2x-y){(2x)²+(y)²+2x×y}

=(2x-y)(4x²+y²+2xy)

Hence, factorise.

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