Question

Please answer these

Answer 1

Answer:

your ist question s answer is 8√15-1

Step-by-step explanation:

38(1) s answer is

216a³ - 125

we know that

216 is the cube of 6

125 is the cube of 5

↛ (6a)³ - 5³

By using identity

a³ - b³ = (a - b)(a² + b² + ab)

↛ (6a)³ - 5³ = (6a - 5)[(6a)² + (5)² + 6a × 5]

↛ (6a - 5) [36² + 25 + 30a]

(ii) answer is also in pic