1.

(a) Factorize `27a^(3) + 125 x^(3)`

Answer» `27a^(3) + 125 x^(3)`
`= (3a)^(3) + (5x)^(3)`
`= (3a + 5x) {(3a)^(2) + (5x)^(2) - (3a) (5x)}`
`= (3a + 5x) (9a^(2) + 25x^(2) - 15ax)`


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