Question

please solve sum 14. second part or third part

Answer 1

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Answer 2

Question 14 {ii}

16a⁴ + 54a

Take out common factor 2a:

= 2a (8a³ + 27)

Question 14 {iii}

a³ + 27b³

Put 27 as 3³:

= a³ + (3b)³

Apply formula: a² + b² = (a + b) (a² - ab + b²):

= (a + 3b)(a² – 3ab + 9b²)