Question

3
Factorise 125x² 64y^3​

Answer 1

125x³-64y³

=(5x)³-(4y)³

now,

5x³-4y³ [identity:a³-b³=(a-b)[a²+ab+b²]

(5x-4y)[(5x)²+(4y)²+5x×4y]

(5x-4y)[25x²+16y²+20xy]

hope this answer will help you.