Question

$factorise \: 4 {a}^{3} b - 16 a {b}^{3}$
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Answer 1

4a³b - 16ab³

= 4ab ( a² - 4b² )

Using formula --- ( a² - b² = ( a + b) ( a - b)

= 4ab ( a + 2b ) ( a - 2b ) Ans

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Answer 2

Step-by-step explanation:

4a^3b-16ab^3

4ab(a^2-4b^2)

4ab[(a)^2-(2b)^2]

4ab(a-2b)(a+2b)